Fill in the blank with the correct number in this number series: 3, 9, 8, 7, __, 5, 18, ?  Choose the correct choice from the following
A) 6
B) 7
C) 9
D) 10
E) 13
This is a simple alternating subtraction and addition series; The first series begins with 3 and adds 5; the second begins with 9 and subtracts 2, and so on.   Answer: 13
<result>E</result>
Fill in the blank with the correct number in this number series: 3, 9, 8, 7, __, 5, 18, ?