Kennedy Generally Only Acted Decisively for African Americans When What

Kennedy generally only acted decisively for African Americans when what happened?

A) He acted decisively when he felt his authority as president was threatened.
B) Kennedy was a great civil rights supporter and acted for civil rights without regard to the thoughts of the white South.
C) He acted decisively when he was asked by the Soviet Union to improve the situation for blacks.
D) Kennedy failed to act decisively in any instance when he was in office.