Select the correct answer. Which situation is best modeled by a linear function with time as the independent variable?

A. the distance traveled by a car driving at a constant 40 miles per hour

B. the value of a car that decreases by 15% each year

C. the total population of a bacteria sample that is doubling in size every 2 days

D. the height of a ball that has been thrown into the air and falls back to the ground​