The simplified form of ^3√72 is 2^3√9. Why is there a 2 outside of the cube root?
A. There is a outside the cube root because two twos divide into 72.
B. There is a 2 outside the cube root because 72 is divisible by 2.
C. There is a 2 outside the cube root because three twos divide into 72.
D. There is 2 outside the cube root because 4 divides into 72.