Final answer:
The correct answer is D. gustaban. The verb gustar is used to express likes and dislikes in Spanish. When talking about multiple things that someone used to like or dislike, you should use the form of gustar that agrees with the plural subject.
Step-by-step explanation:
The correct answer is D. gustaban.
The verb gustar is used to express likes and dislikes in Spanish. When talking about multiple things that someone used to like or dislike, you should use the form of gustar that agrees with the plural subject. In this sentence, the subject is naranjas (oranges), which is plural. Therefore, the appropriate form of gustar is gustaban, which means 'they used to like'.
Example: A Juan le gustaban las películas de terror. (Juan used to like horror movies.)
Learn more about gustar verb conjugation