A store sells wrapping paper only in square sheets of integer length. If Robert has to wrap a cylinder of radius 3 centimeters and height 5 centimeters, what is the length, in centimeters, of the smallest sheet he can buy?
A. 13
B. 12
C. 10
D. 8
E. 7
A. 13
B. 12
C. 10
D. 8
E. 7