Insert the missing number.
8, 7, 11, 12, 14, 17, (....)  Pick one:
A) 27  B) 20  C) 22  D) 17  E) 26
There are two series (8, 11, 14, 17) and (7, 12, 17) increasing by 3 and 5 respectively.   answer : 17
<result>D</result>
Insert the missing number.
8, 7, 11, 12, 14, 17, (....)