AMC8 2015 Problem 12

Past Contests AMC8 AMC 8 - 2015
1

How many pairs of parallel edges, such as \overline{A B} and \overline{G H} or \overline{E H} and \overline{F G}, does a cube have?

Answer Choices
A. 6
B. 12
C. 18
D. 24
E. 36