Insert the missing number.
8, 7, 11, 12, 14, 17, 17, (....)  Pick one
A) 27
B) 20
C) 22
D) 24
E) 26
There are two series (8, 11, 14, 17) and (7, 12, 17, 22) increasing by 3 and 5 respectively.   answer : 22
<result>C</result>
Insert the missing number.
8, 7, 11, 12, 14, 17, 17, (....)