Final answer:
The sentence 'Eran las cinco de la tarde' is correct because it uses the appropriate imperfect verb form.
Step-by-step explanation:
The subject of the question is Spanish because the sentence given is in Spanish and relates to the use of the imperfect verb form.
In the sentence, eran is the imperfect form of the verb ser which means 'to be'.
The sentence 'Eran las cinco de la tarde' is correct because it means 'It was five in the afternoon' and uses the appropriate imperfect verb form.
Learn more about Imperfect verb form in Spanish