The Tea Party movement :

A) has much in common with both major parties.
B) has made the Republican Party more conservative.
C) supported President Obama's 2009 economic stimulus plan.
D) started during the first administration of Ronald Reagan.

Option B ==> Has made the Republican Party more conservative.

Explanation:

Although, it might not be true but many people think that the word "Tea" in the Tea Party movement is an acronym that stand for "Taxed Enough Already" and this is because the Tea Party Movement was a political party me movement that fought for the reduction in tax levies that is to decrease taxes.

The parent party of the Tea Party Movement is the Republican party but the difference is that the Tea Party Movement believe in libertarianism and CONSERVATISM that's to say the ideology if movement was that private sector of the economy should be given the right to ownership and individuals can own things. The term CONSERVATISM also means that they believe in traditional values.

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.