While Astronauts in a Spaceship with a Speed of 0

Multiple Choice

While astronauts in a spaceship with a speed of 0.6c relative to Earth move outward from Earth toward Jupiter,they observe a cosmic ray shower that contains particles moving toward them at 0.2c relative to Earth.One of the particles has a rest energy of 3.0 GeV and a momentum,as measured by the astronauts,of 4.0 GeV/c.Its kinetic energy is

A) 7.0 GeV
B) 4.0 GeV
C) 5.0 GeV
D) 2.7 GeV
E) 2.0 GeV