A Projectile Fired from a Gun Has Initial Horizontal and Vertical

Multiple Choice

A projectile fired from a gun has initial horizontal and vertical components of velocity equal to 30 m/s and 40 m/s, respectively.
-What is the speed of the projectile when it is at the highest point in its trajectory?

A) 0 m/s
B) 20 m/s
C) 30 m/s
D) 40 m/s
E) 50 m/s