Astronaut Rob Leaves Earth in a Spaceship at a Speed $0.960 \mathrm { c }$

Multiple Choice

Astronaut Rob leaves Earth in a spaceship at a speed of $0.960 \mathrm { c }$ relative to an observer on Earth. Rob's destination is a star system $14.4$ light-years away (one light-year is the distance light travels in one year) . Relative to a frame of reference that is fixed with respect to Earth, how long does it take Rob to complete the trip?

A) $4.20$ years
B) $14.4$ years
C) $10.8$ years
D) $22.7$ years
E) $15.0$ years