I THINK...
Abraham Lincoln
James Buchanan
George Washington
Thomas Jefferson
Theodore Roosevelt
He wasn't commited nor was the Citizens
I believe the answer is "B."
Three centuries of the slave trade had taught Europeans that Africans were inferior, and that helped to justify imperialism in the minds of many Europeans. Even slave abolitionists contributed to this by arguing that Africans had to be "protected" from slavers; i.e. they couldn't take care of themselves.
They should buy from the home country, Great Britain.