Look at this series: 3, 4, 7, 8, 11, 12, ... What number should come next?	Choose the correct choice from the following:
A) 7	B) 10	C) 14	D) 15	E) 16
Explanation: This alternating addition series begins with 3; then 1 is added to give 4; then 3 is added to give 7; then 1 is added, and so on.   Answer: Option 15
<result>D</result>
Look at this series: 3, 4, 7, 8, 11, 12, ... What number should come next?