50, 47, 45, 42, 40, 37, 35, 32, ?  Choose the correct answer:
A) 31 B) 30 C) 29 D) 28 E) 27
This is an alternating number subtraction series. The pattern is -3, -2, -3, -2, ....   The answer is 30.
<result>B</result>
50, 47, 45, 42, 40, 37, 35, 32, ?