Two Stars Are at Rest Relative to Each Other

Multiple Choice

Two stars are at rest relative to each other.A spaceship is moving between these two stars at 0.932c relative to each star.To someone in the ship,the distance between the two stars appears to be
What is the distance between the stars in their own rest frame?

A) 72.8 light-years
B) 9.57 light-years
C) 21.1 light-years
D) 55.4 light-years