Answer:
B. Their commitment to political action.
Explanation:
Just took it. Edg 2020. Hope this helps :)
Btw the answer above mine is incorrect but still a smart answer.
They differed in social organizations
The Farmers' Alliance grew out of the Grange movement, which formed social organizations among farmers and which had flourished the Midwest and had spread in popularity to the South.
I hope this helped ;)
a