Which expression is equivalent to (10q^5w^7)/(2w^3) * (4(q^6)^2)/(w^-5) for all values of q and  w where the expression is defined?

A. 32q^7/w

B. 20q^17w^9

C. 32q^7w^9

D. 20qw

C. 32q^7w^9