Which list shows all the factor pairs of 64?
A. 1 and 64, 2 and 32, 3 and 18, 8 and 8.
B. 1 and 64, 2 and 32, 4 and 16, 8 and 8
C. 1 and 64, 2 and 32, 3 and 16, 8 and 8
D. 1 and 64, 2 and 32, 4 and 18, 8 and 8