Final answer:
The subject of this question is Spanish and it asks about the sleep habits of a group of friends. The correct response is 'Ellos siempre se acuestan a las diez.'
Step-by-step explanation:
The subject of this question is Spanish. The question is asking about the sleep habits of the speaker's group of friends. The correct response is: Ellos siempre se acuestan a las diez, which means 'They always go to bed at ten o'clock.' In this context, 'se acuestan' is the reflexive verb in the third person plural form and 'a las diez' indicates the time when they go to bed. The other options are incorrect because they refer to different people or times.
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