Find the Coefficient a of the Term in the Expansion $\begin{array}{lr}\text { Binominal }&\text { Terms }\\(x+7)^{12} & a x^{5}\end{array}$

Multiple Choice

Find the coefficient a of the term in the expansion of the binomial. $\begin{array}{lr}\text { Binominal }&\text { Terms }\\(x+7) ^{12} & a x^{5}\end{array}$

A) -407,653,785
B) -652,246,056
C) 760,953,732
D) 181,179,460
E) 652,246,056