What political development in the election of 1848 signaled that the e

What political development in the election of 1848 signaled that the extension of slavery in any new territory and any newly admitted state would shortly become the most bitterly contested political issue for the country?

A) the nomination of Zachary Taylor, a slaveholder and nationalist, as the Whig Party nominee for president
B) the nomination of Lewis Cass of Michigan, an expansionist, as the Democratic Party nominee for president
C) the creation of the Free Soil Party by Northerners who couldn’t support either Taylor or Cass for ideological reasons and the nomination of Martin Van Buren as president
D) the reelection of President Polk as president and his support for extending slavery to New Mexico and California

ANSWER
Answer: A