Which equation could be used to solve the problem?

Joan picked 4 bushels of apples in one hour.

At that rate, how many bushels would she pick in 8 hours (b)?

A.
b = 8 ÷ 4

B.
b = 4 ÷ 8

C.
b = 8 + 4

D.
b = 8 • 4