Projectiles: for General Projectile Motion, When the Projectile Is at the Highest

Projectiles: For general projectile motion, when the projectile is at the highest point of its trajectory

A) its acceleration is zero.
B) its velocity is perpendicular to the acceleration.
C) its velocity and acceleration are both zero.
D) the horizontal component of its velocity is zero.
E) the horizontal and vertical components of its velocity are zero.