Free Points!!!!!!!

Which list shows all the factor pairs of 32?

A.

1 and 32, 2 and 16, 4 and 8, 6 and 6

B.

1 and 32, 2 and 16, 4 and 8

C.

1 and 32, 2 and 16, 4 and 9

D.

1 and 32, 2 and 16, 4 and 8, 6 and 7