Velocity Addition: Three Spaceships A, B, and C Are in Motion

Multiple Choice

Velocity addition: Three spaceships A, B, and C are in motion, as shown in the figure. The commander on ship B observes ship C approaching with a relative velocity of 0.78c. The commander also observes ship A, advancing in the rear, with a relative velocity of 0.31c. What is the velocity of ship C, relative to an observer on ship A?

A) 0.88c
B) 0.38c
C) 1.4c
D) 0.62c
E) 1.1c