A 75-kg astronaut pushes against the inside back wall of a 2000-kg spaceship and moves toward the front. Her speed increases from 0 to 1.9 m/s. Use distant stars as the object of reference. What is the momentum gained by the astronaut?

a) 142.5 kg m/s
b) 213.75 kg m/s
c) 284.25 kg m/s
d) 356.25 kg m/s