Spaceship a Travels at 0

Spaceship A travels at 0.400c relative to an earth observer. According to the same observer, spaceship A overtakes a slower moving spaceship B that moves in the same direction. The captain of B sees A pass her ship at 0.114c. Determine the speed of B relative to the earth observer.

A) 0.100c
B) 0.214c
C) 0.300c
D) 0.625c
E) 0.700c