15, 30, 22, 44, 36, 72, ?	Choose the correct option:
A) 43
B) 25
C) 58
D) 47
E) 64
64   64   This is an alternating multiplication and subtracting series with a pattern x2, -8, x2, -8.
<result>E</result>
15, 30, 22, 44, 36, 72, ?