Cho hai điểm A(xA;yA;zA), B(xB;yB;zB), khi đó độ dài đoạn thẳng

A. $AB=\sqrt{{\left(x_B-x_A\right)}^2+{\left(y_B-y_A\right)}^2+{\left(z_B-z_A\right)}^2}$

B. $AB=\sqrt{{\left(x_B+x_A\right)}^2+{\left(y_B+y_A\right)}^2+{\left(z_B+z_A\right)}^2}$

C. $AB={\left(x_B-x_A\right)}^2+{\left(y_B-y_A\right)}^2+{\left(z_B-z_A\right)}^2$

D. $AB=\sqrt{{\left(x_B-x_A\right)}^2}\sqrt{{\left(y_B-y_A\right)}^2}+\sqrt{{\left(z_B-z_A\right)}^2}$