Find the Coefficient a of the Term in the Expansion $\begin{array}{lr}\text { Binominal }&\text { Terms }\\(x-7 y)^{10}& a x^{8} y^{2}\end{array}$

Multiple Choice

Find the coefficient a of the term in the expansion of the binomial. $\begin{array}{lr}\text { Binominal }&\text { Terms }\\(x-7 y) ^{10}& a x^{8} y^{2}\end{array}$

A) 2,208
B) 2,204
C) 2,206
D) 2,205
E) 2,203