Question

when marcus garvey was in his twenties, he toured central america and witnessed the oppression of migrant workers, an experience that
inspired his support of pan africanism and his political activism.
helped him decide to move to central america permanently to advocate on their behalf.
pushed him to join forces with w. e. b. du bois and the niagara movement.
motivated him to move home to jamaica, where he founded the black star line.

Explanation:

Marcus Garvey's experience witnessing the oppression of migrant workers in Central America inspired his support for Pan - Africanism and political activism. There is no evidence that this experience led him to move to Central America permanently (he was already touring there), nor is there a clear connection to joining the Niagara Movement (which had different focuses), and founding the Black Star Line was later and not directly tied to this Central American experience in the way described in the first option.

Answer:

inspired his support of Pan Africanism and his political activism.