Final answer:
The correct answer is 'leían' as it is the appropriate form of the verb in the simple past tense.
Explanation:
In the given question, the correct option is 'leían,' which is the correct form of the verb in the context provided. This verb is in the simple past tense, denoting an action that happened in the past. In this case, the verb 'leían' corresponds to the Spanish subject pronoun 'ellos' (they), with the correct form 'leían' being used to agree with the subject.
Learn more about Verb forms in Spanish here:
https://brainly.com/question/42311791
