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