The seneca falls convention, held in 1848, is a significant event in united states history because it a supported the missouri compromise b was the first national labor union meeting c provided the united states with new western territory d was an important step in the women’s rights movement

i believe the answer is:

-   william jennings bryan is a democrat while mckinley was a republican

at that time, the segment of population that choose for democratic party were the voters with low economic background and vice versa

- william jennings has support of populists and wants to have inflation to farmers while mckinley has support of bankers and businessmen , doesn't want inflation

the fixed value of gold make the large business able to stack up their gold without   being worried that it would devaluated.

- william jennings supported the silver standard while mckinley supported the gold standard

according to jenning, using other metal beside gold could the poor people to have more purchasing power and them advance in the society.

during the 1920s the goal of the united states was not letting business collide or go down or even compete this was due to wwl