24 !
which graph best represents the motion of an airplane flying with equal amounts of thrust and air resistance?
a
b
c
d

I would say D, because it did not say you are just starting the flight. If it did, then it would be B, because you need to speed up and you are going upwards. It said you are going in the same amount of speed, and of course, if you are going in the same speed, you can't make time pass faster or slower. So, if it was me, I would choose D as an answer.