The ___ challenged the pagan kingdom and prevailed against them

Mongols

Explanation:

Repeated Mongol invasions (1277–1301) toppled the four-century-old kingdom in 1287. The collapse was followed by 250 years of political fragmentation that lasted well into the 16th century.

where is the section with the question?

the answer is d. party organizers, volunteers, voters and elected officials.