Who has a correct statement?
A. Arian says, "The Vx of a projectile varies due to gravity, but the Vy stays constant."
B. Franze: "Both vx and vy are constant." о O
C. Richard says, "A bullet does not accelerate vertically, but it does accelerate horizontally," O
D. Riter: "A projectile has vertical acceleration and a constant horizontal velocity"​