Which motion listed below matches the graph?

a. a student walks in a straight line 10 meters from the door in one second; rests for three seconds; then walks back in a straight line back to the door in two seconds

b. a student moves at accelerates 10 meters for two seconds away from the door in a straight; moves at a constant speed for two seconds; decelerates for two seconds back to the door

c. a student walks in a straight line 10 meters from the door in two seconds; rests for two seconds; walks back in a straight line back to the door in two seconds