Look at this series: 72, 76, 73, 77, 74, __, 75, ... What number should fill the blank?	Choose the correct choice from the following choices
A) 70	B) 71	C) 75	D) 78	E) 79
Explanation: This series alternates the addition of 4 with the subtraction of 3.   Answer: Option 78
<result>D</result>
Look at this series: 72, 76, 73, 77, 74, __, 75, ... What number should fill the blank?