Cho khai triển

Câu hỏi: Cho khai triển ${\left(1-\frac{2x}{3}\right)}^n=a_0+a_{1}x+a_2{x}^2+\dots +a_n{x}^n$ . Tìm $max\left\{a_0;a_1;a_2;\dots ;a_n\right\}$ biết $A_{n-2}^2+C_n^{n-2}=188.$

A. $C_{13}^6.{\left(-\frac{2}{3}\right)}^6.$

B. $C_{12}^8.{\left(-\frac{2}{3}\right)}^8.$

C. $C_{13}^7{\left(-\frac{2}{3}\right)}^7.$

D. $C_{13}^8.{\left(\frac{2}{3}\right)}^7.$