Final answer:
The question regarding when the car stops cannot be answered without a velocity-time graph or additional descriptions of the car's motion. Typically, the stopping time is when the velocity becomes zero, but the provided information does not allow us to determine this.
Step-by-step explanation:
To determine at which of the lettered times the car stops, we would typically need a description of the car's motion, such as a velocity-time graph or some narrative describing changes in speed. However, based on the provided information, there isn't enough context to accurately answer the question regarding when the car stops. The references to the car 'going over the top faster than this speed' or 'slower than this speed' suggest a discussion about relative motion, possibly comparing different scenarios, speeds, or times.
Without additional information or a graph, it is impossible to choose between options A, B, C, or D. But generally speaking, a car stops when its velocity decreases to zero. Therefore, to identify when the car stops, we look for when the car's velocity is zero during its motion.