Cho

Câu hỏi: Cho ${\log }_{27}5=a,{\log }_{8}7=b,{\log }_{2}3=c$. Tính ${\log }_{12}35$

A. $\frac{3b+3ac}{c+2}$

B. $\frac{3b+2ac}{c+2}$

C. $\frac{3b+2ac}{c+3}$

D. $\frac{3b+3ac}{c+1}$