For Identical Cannons and Identical Projectiles and Identical Initial Speeds $\degree$

Multiple Choice

For identical cannons and identical projectiles and identical initial speeds, but different pointing angles, the maximum distance for its projectile is attained for the cannon which launches at

A) 32 $\degree$ above horizontal.
B) 45 $\degree$ above horizontal.
C) either 32 $\degree$ or 58 $\degree$ above horizontal.
D) zero degrees-a flat trajectory.