If You Were to Design a Spacecraft That Could Travel

Multiple Choice

If you were to design a spacecraft that could travel to the galactic center fast enough that the astronauts aboard aged by only 25 years during the trip, how fast would the spacecraft have to go? (Note: The galactic center is 25,000 light years away.)

A) 0.95c
B) 0.995c
C) 0.99995c
D) 0.9999995c
E) 0.999999995c