Why Was the Colonization Movement Involving the Resettlement of Blacks

Why was the colonization movement involving the resettlement of blacks to Liberia largely ineffective?

A) African Americans did not trust the motives of white supporters of colonization.
B) Slaveholders feared that the resettlement of African Americans to western Africa would financially ruin the Upper South and the border states.
C) Northern shipping companies did not have the financial resources to relocate African Americans to western Africa.
D) European powers threatened to declare war on the United States because they saw the colonization movement as an encroachment on their sphere of influence.