Cho ba phân thức 3/5x^2 .yz, 5/4y^2. z; 6/xz^2. Chọn khẳng định đúng

A. $\frac{3}{5x^{2}yz}=\frac{12yz}{20x^2{y}^2{z}^2}$ ;$\frac{5}{4y^{2}z}=\frac{25x^{2}z}{20x^2{y}^2{z}^2}$ $;\frac{6}{x{z}^2}=\frac{120x{y}^2}{20x^2{y}^2{z}^2}$

B. $\frac{3}{5x^{2}yz}=\frac{12yz}{20x^2{y}^2{z}^2}$; $\frac{5}{4y^{2}z}=\frac{25x^{2}z}{20x^2{y}^2{z}^2}$ $;\frac{6}{x{z}^2}=\frac{x^{2}y}{20x^2{y}^2{z}^2}$

C. $\frac{3}{5x^{2}yz}=\frac{3yz}{x^2{y}^2{z}^2}$; $\frac{5}{4y^{2}z}=\frac{5x^{2}z}{x^2{y}^2{z}^2}$; $;\frac{6}{x{z}^2}=\frac{x^{2}y}{x^2{y}^2{z}^2}$

D. $\frac{3}{5x^{2}yz}=\frac{3yz}{20x^2{y}^2{z}^2}$; $\frac{5}{4y^{2}z}=\frac{20x^{2}z}{20x^2{y}^2{z}^2}$; $;\frac{6}{x{z}^2}=\frac{120x^{2}y}{20x^2{y}^2{z}^2}$