Ced-9 is a suppressor of apoptosis, and ced-3 is required for apoptosis. Ced-9 functions upstream of ced-3.

A) Ced-3 promotes cell survival.
B) Ced-9 activates ced-3 in the apoptosis pathway.
C) Ced-9 and ced-3 have unrelated functions.
D) Ced-3 inhibits the action of Ced-9.