Answer: C) Its acceleration is decreasing in magnitude as the car slows down.
Step-by-step explanation:
According to the described situation the car's final velocity is less than its initial velocity, this means the car's velocity decreased as it slows down.
On the other hand, acceleration
is defined as the variation of velocity in time:
If the car's velocity decreases, its acceleration is negative. Hence, the acceleration is decreasing in magnitude as well.