Chọn câu sai 2/7.14/6=2/3 25.-4/15=-20/3 (2/-3)^2.9/4=1

A. $\frac{2}{7}.\frac{14}{6}=\frac{2}{3}$

B. $25.\frac{-4}{15}=\frac{-20}{3}$

C. ${\left(\frac{2}{-3}\right)}^2.\frac{9}{4}=1$

D. $\frac{-16}{25}.\left(\frac{25}{-24}\right)=\frac{-2}{3}$