The Correct answer is D.

Explanation

It could not be true that each of the ten cars contained exactly ?2 people, as this would give a total of only 20. If nine of the cars contained exactly ?2 people, the remaining car could have no more than 4 people, for a total of only 22. Continuing in the same way, a pattern develops. If eight of the cars contained exactly 2 people, the remaining two cars could have no more than 4 people each, for a total of only 24. If seven of the cars contained exactly 2 people, the total number of people could be only 26. From the pattern, you can see that if four of the cars contained exactly 2 people, and the remaining six cars contained the maximum of ?4 people, the total number would be 32, as given in the question. Therefore, at most four of the ten cars could have contained exactly 2 people.