Look at this series: 7, 10, 8, 11, 9, 12, 10, ... What number should come next?	Pick:
A) 7	B) 10	C) 12	D) 13	E) 14
This is a simple alternating addition and subtraction series. In the first pattern, 3 is added; in the second, 2 is subtracted.   The answer is 13.
<result>D</result>
Look at this series: 7, 10, 8, 11, 9, 12, 10, ... What number should come next?