He added: "Walking away and trading under World Trade Organisation conditions will mean the manufacturing industry in this country would be severely damaged".
The Lib Dems, she said, were willing to "prop up" Labour, while she warned the SNP's "tunnel vision" over Scottish independence risked destabilizing the country.
"Vote for strong and stable leadership this country needs".
"He has not made clear how they would finance our two per cent commitment to North Atlantic Treaty Organisation and at every point he has voted against a stronger defence, including the renewal of Trident last July".
Mrs. May, who became PM last July after the European Union referendum, told MPs that it would be wrong for the United Kingdom to find itself reaching the most "difficult and sensitive" phase of Brexit negotiations in late 2018 and early 2019 at a time when a general election was "looming on the horizon".
Accusing the party of putting forward "offensive and negative trash about our country", she said any attempt to denigrate the United Kingdom for poltical gain would be "shameful".
He will add: "These rules have created a cosy cartel which rigs the system in favour of a few powerful and wealthy individuals and corporations".
British opposition Labour leader Jeremy Corbyn insisted Thursday that he could still win a snap June election despite dire poll ratings, pitching himself as an anti-establishment candidate fighting for change.
He denounced the "morally bankrupt " Conservative Party, which was determined to maintain the elitist system while cutting public services and blaming migrants and the unemployed for the woes of the economy.
Controversial business figures like Sir Philip Green, Mike Ashley, Southern Rail and the chief executives of tax-dodging multinationals should be anxious about the prospect of a Labour victory, he will say.
Bebe is closing all its stores, the latest casualty in retail
In March, Bebe management and its board said they would explore "strategic alternatives" and hired financial advisor B. Bebe had 180 retail stores as of December 31, 2016 and about 2,601 employees as of July 2, 2016, according to filings.
He said the poll was a battle of "the Conservatives, the party of privilege and the richest, versus the Labour Party, the party that is standing up for working people to improve the lives of all".
"It is wealth that should belong to the majority and not the tiny minority".
Mr Corbyn retorted: "We welcome the general election but this is a Prime Minister who promised there wouldn't be one, a Prime Minister who can not be trusted".
"In recent weeks Labour have threatened to vote against the final agreement we reach with the EU, the Liberal Democrats have said they want to grind the business of government to a standstill, the SNP say they will vote against the legislation that formally repeals Britain's membership of the EU", May explained.
Mr Corbyn said Conservative cuts to education budgets would only make the problem worse.
The First Minister said Ms May wants to seize the opportunity to strengthen her power before people become more concerned about the Brexit plan as its implications emerge.
But Corbyn refused to go and because the leader is chosen by Labour Party members who consistently back him, he retained the leadership.
Mr Corbyn simply replied: "All I can say is, in 2015, nearly exactly two years ago, I was given 200/1 as an outside chance [of being elected Labour leader]".
Answering questions, Mr Corbyn said Labour's manifesto would be "fully costed and will be all accounted for and paid for".