The "party in power" from the early 1930s until the late 1960s was this party.
a. republican party
c. american independent party
b. progressive party
d. democratic party

The "party in power" from the early 1930s until the late 1960s was  democratic party they held majority in the house in all these years except two terms

Contributing factors  leading  to the harlem renaissance were the great migration of african americans to northern cities, which concentratedambitious  people in places where they could encourage each  other, and the first world war, which had created new industrial work opportunities for tens of thousands of people.

Idon't think any of em are right, you need to add the number of what paragraph you got your citation from