Answer by JKismyhusbandbae: A) Porque mejoran las relaciones sociales.
Why: "Mucho se ha hablado de que comer en familia es un asunto cultural, muy común en las sociedades latinoamericanas." They are eating for more sociable relationships with family.
The answer is "an infinitive verb".
Acabar de + infinitive is used to express an action that has ended prior the enunciation of the sentence.
(I chose one of the three options, because when I asked how many where there; I got no answer)
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I believe the answer is <span><em>public schools start at 9 AM every day</em></span>.
<em>Option 1</em><em> RIGHT</em>
I think the answer is the first one because I went to public schools and I noticed that.
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Option 2 </em><em>WRONG</em><em />
I think the second option isn't right because public schools' basic subjects are studied in english.
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Option 3 </em><em>WRONG</em>
It's wrong because most people live near the school that they can go by walking and/or biking.