An Observer Is Moving in Space Toward a Distant Star

An observer is moving in space toward a distant star at 200 km/s while the star is moving toward the observer at 400 km/s; the relative velocity being 600 km/s of approach. What relative change in frequency of the light from the star as seen by the observer? (The speed of light in space is 3.00 *10⁵ km/s) .

A) 0.067% increase
B) 0.20% decrease
C) 0.20% increase
D) 0.033% decrease