What is the effect of the Hyper X's engine taking all the oxygen it needs from the air while traveling?

A.

It does not have to carry heavy oxygen tanks, so it can carry more important things.

B.

It helps the Hyper X to slow down at intervals.

C.

It can be used to help human beings journey through space into other galaxies.

D.

It helps the Hyper X to travel at supersonic speed.