8, 12, 9, 13, 10, 14, 11, ... choose which pair of numbers comes next?

A 14, 11

B 15, 12

C 8, 15

D 15, 19

E 8, 5

Correct Answer: Option B

This is an alternating addition and subtraction series, in which the addition of 4 is alternated with the subtraction of 3.