Astronaut Rachel Leaves Earth in a Spaceship at a Speed

Multiple Choice

Astronaut Rachel leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth. Rachel's destination is a star system 14.4 light-years away (one light-year is the distance light travels in one year) . According to Rachel, how long does the trip take?

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