If for some n; $${}^{6}C_{m}+2^{6}C_{m+1}+{}^{6}C_{m+2}>{}^{8}C_{3}$$ and $$^{n-1}P_3 : ^nP_4 = 1:8$$, then $$^nP_{m+1} + ^{n+1}C_m$$ is equal to

A

380

B

376

C

384

D

372