By 1850 southerners had reason to fear for the future of slavery for a

By 1850 southerners had reason to fear for the future of slavery for all of the following reasons EXCEPT

A) Congress had banned slavery from the territories ceded by Mexico in the Treaty of Guadalupe Hidalgo.
B) slavery was declining in the Upper South.
C) slave ownership was increasingly concentrated in fewer and fewer hands in the South itself.
D) Britain had abolished slavery in their Caribbean colonies.

ANSWER
A