A projectile is fired from point $O$ and moves along the trajectory $OPQRS$, as illustrated. Air resistance can be ignored. Which statement is correct about the projectile when it is at the highest point $Q$ of its trajectory?
- AThe horizontal component of the projectile’s acceleration is zero.
- BThe horizontal component of the projectile’s velocity is zero.
- CThe kinetic energy of the projectile is zero.
- DThe momentum of the projectile is zero.