Use substitution to find the indefinite integral.
$\int \frac{5 \, dm}{(5m - 3)^6}$
Describe the most appropriate substitution case and the values of $u$ and $du$. Select the correct choice below and the answer boxes within your choice.
A. Substitute $u$ for the quantity under a root or raised to a power. Let $u = \Box$, so that $du = (\Box) \, dm$.
B. Substitute $u$ for the quantity in the denominator. Let $u = \Box$, so that $du = (\Box) \, dm$.
C. Substitute $u$ for the exponent on $e$. Let $u = \Box$, so that $du = (\Box) \, dm$.
