When fully simplified, ignoring non-permissible values, 12x^12/4x^3 divided by x^8/24x^6?

a)72x^3
b)1/72x^7
c)1/72x^3
d)72x^7

12x^12/4x^3 = 3x^9

x^8/24x^6 = x^2/24

3x^9 * 24/x^2 = 72x^7