When buying a new car, you have a choice of 4 different models, 3 different colors, and 2 different sizes. How many choices are there for one car?

A. 5
B. 12
C. 16
D. 24.

There are 4 * 3 * 2 = 24 different choices for one car.

Answer: D. 24.

To calculate the total number of choices for one car, you need to multiply the number of choices for each category together.

Given that there are 4 different models, 3 different colors, and 2 different sizes, the total number of choices for one car would be:

4 (number of models) x 3 (number of colors) x 2 (number of sizes) = 24

Therefore, the correct answer is D. 24.