An enemy spaceship is moving toward your starfighter with a speed of 0.400c, as measured in your reference frame. The enemy ship fires a missile toward you at a speed of 0.700c relative to the enemy ship. What is the speed of the missile relative to you? Express your answer in terms of the speed of light.
A. 0.85c
B. 0.92c
C. 0.75c
D. 0.60c