The Figure Shows a Side View of a Galaxy That

The figure shows a side view of a galaxy that is 50.0 light years in diameter. This value for the diameter is its proper length. A spaceship enters the galactic plane with speed 0.995c relative to the galaxy. Assume that the galaxy can be treated as an inertial reference frame. Note: A light year is the distance that light travels through vacuum in one year; that is, 1 light year = c × (1 year) .
-Determine the diameter of the galaxy as perceived by a person in the spaceship.

A) 2.49 light years
B) 3.63 light years
C) 4.99 light years
D) 12.4 light years
E) 36.3 light years