Simplify following and write answer in exponential form \large\frac{7^6 \times 7^5 \times 7^2}{7^5 \times 7^6}\times 7^7 \times 7^8 = ?

Question

( A ) 7^{15}
( B ) 7^{16}
( C ) 7^{18}
( D ) 7^{17}