Look at the Circle R and the circle S.

How does the circumference of Circle S compare to the circumference of Circle R?
A. The circumferences of Circle R and Circle S are equal.
B. The circumference of Circle S is 4 times the circumference of Circle R.
C. The circumference of Circle S is 3 times the circumference of Circle R.
D. The circumference of Circle S is 2 times the circumference of Circle R.