A group of students collected distance versus time data for a model car

which describes how the speed of the car is changing over time?

a the speed is increasing because the distance traveled during each time increment is increasing.

b the speed is increasing because the distance traveled during each time increment is decreasing.

c the speed is decreasing because the distance traveled during each time increment is increasing.

d the speed is decreasing because the distance traveled during each time increment is decreasing.

pls help! no trolls