A speed versus time graph is shown: A Speed versus Time graph is shown with y-axis labeled position in centimeters per second up to 5 and x-axis labeled time in seconds up to 8. A straight line connects the points 0, 0 and 4, 4. A horizontal line connects points 4, 4 and 8, 4.

Which statement accurately describes the motion of the object in the graph above?

Group of answer choices

It is moving from 0 s to 4 s at a constant speed of 2 cm/s.

It is at rest for 4 seconds from 4 s to 8 s and then speeds up.

It is moving from 4 s to 8 s at constant speed of 4 cm/s.

It is speeding up from 0 s to 4 s then it is at rest.