Ed needed to extend the string on his kite. The current string was 9 3/4 feet. He cut a piece of string that measured 2.5 feet and added it to the existing string. What is the new length of the string?
A. 12 1/4 feet
B. 11 3/4 feet
C. 7 1/2 feet
D. 7 1/4 feet