Between 25 and 35 seconds the force acting on the rocket is greatest.
Between 20 and 25 seconds a force is acting on the rocket to slow it down.
No force is acting on the rocket between 45 to 55 seconds
It is obvious that no external forces are acting on the rocket during the time span between 0 and 55 seconds after launch.

Which comment below is TRUE?

A powerful force acts on the rocket between 5 and 10 seconds.
At 25 seconds the force acting on the rocket ceases.
At 50 seconds a force acts to accelerate the rocket
At 25 seconds after launch a force acts on the rocket and stops it from moving.

10 to 15 seconds
30 to 35 seconds
35 to 40 seconds
15 to 25 seconds