While Candidate Donald Trump Ran for the Office as a Republican

While candidate Donald Trump ran for the office as a Republican, he espoused some views that went against the party's usual support for free trade.Most notably, Trump criticized international free trade agreements.As president, he called for tariffs, even on some close U.S.allies, including Canada and countries of the European Union. As unusual as they may have seemed, however, Trump's stances here fit with a strain of conservatism that has its roots in:

A) some mix of liberalism and conservatism, as is typical in American politics.
B) support for the social and economic status quo, which had dramatically shifted during the Obama years.
C) skepticism about international organizations in foreign affairs.
D) populism, which generally is isolationist in international affairs.