While using a skipping rope, Emily jumps 52 times in 60 seconds. Jumping at this same rate, how many times does Emily jump in 75 seconds?
(A) 66
(B) 52
(C) 65
(D) 67
(E) 73
When Emily jumps for 75 seconds, she jumps for $60+15$ seconds.

Jumping at the rate of 52 times in 60 seconds, Emily jumps $52 \div 4=13$ times in $60 \div 4=15$ seconds.

Since Emily jumps 52 times in 60 seconds and 13 times in 15 seconds, then Emily jumps $52+13=65$ times in $60+15=75$ seconds.

ANSWER: $(\mathrm{C})$