Kết quả nào sau đây đúng? (10xy^2) : (2xy) =5xy

A. $\left(10x{y}^2\right):\left(2xy\right)=5xy$ 

B. $\left(-\frac{3}{5}{x}^4{y}^{5}z\right):\left(\frac{5}{6}{x}^3{y}^{2}z\right)=\frac{18}{25}x{y}^3$ 

C. ${\left(-\frac{3}{4}x{y}^2\right)}^2:\left(\frac{3}{5}{x}^2{y}^3\right)=\frac{15}{16}y$ 

D. $(-3x^2{y}^{2}z):(-yz)=-3x^{2}y$