Velma Is in a Rocket Ship Moving North Past Mort

Multiple Choice

Velma is in a rocket ship moving north past Mort at half of lightspeed relative to Mort. She fires a laser beam forward from the front of her ship. Mort sees the laser beam move at

A) c.
B) 0.5c.
C) slightly faster than c.
D) 1.5c.
E) slightly slower than speed c [lightspeed].