Which of the Following Ideas Is True About Projectile Motion $\mathrm{v}_{\mathrm{x}}^{2}$

Multiple Choice

Which of the following ideas is true about projectile motion with no air drag?

A) $\mathrm{v}_{\mathrm{x}}^{2}$ + $\mathrm{v}_{\mathrm{y}}^{2}$ = constant.
B) The acceleration is +g when the object is rising and -g when falling.
C) The velocity of the object is zero at the point of maximum elevation.
D) The trajectory will depend on the object's mass as well as its initial velocity and launch angle.
E) The horizontal motion is independent of the vertical motion.