What event made the Democratic party skeptical of allying themselves too closely with a radical political movement?

a. Democrats felt that Ralph Nader’s Green Party cost Al Gore the election in 2000.
b. The Populists supported a Democratic candidate for president in 1896, but occasionally shifted their support to like-thinking Republicans.
c. They observed how the energetic Tea Party movement in 2009-2010 frustrated moderate Republicans.
d. Democrats felt disdain towards the “Know Nothing” movement that opposed immigration and naturalization in the 1840s.
e. The anti-business Populism of the 1930s was a threat to Democrats’ major donors.

ANS: B