Step-by-step explanation:
between 0 and 2 hours the relationship between time and distance traveled is a linear one.
that means that the velocity (= distance/time like in km/s) is constant (and not increasing).
and because between the hours 2 and 3 there is no increase in distance, this means the car stood still during that time. so, no, it was not always in motion during the voyage.
therefore,
option 2 is correct (as described, no change in distance means no motion or zero velocity).
and option 3 is correct, because also between hours 3 and 5 the function is linear and the speed ratio is therefore constant.