article: For many school in Thailand, there are two terms. The first term is from the first week of May to the first week of October. The second term starts from the first week of November and finishes at the last week of February or the first week of March. The students don't get a _ for Christmas . But they get a 3-4 days' break for the New Year.
  For many students, a school day is very long. They usually get to school at 7:30 a.m. Classes begin at 8:00 a.m. there are three classes in the morning and they are 50 minutes each . Students have lunch at 11:00 a.m. they don't have dining halls so they have to eat in the classroom. Lunch time finishes at 12:25 p.m. there are three classes in the afternoon. School finishes at 3:15 p.m. many schools have a "homework" lesson after school, so students usually go home after 4:45 p.m.
question: Why do students have to eat lunch in the classroom?
options: Because their dining halls are very small. Because they must do their homework after lunch. Because they don't have dining halls. Because they bring lunch to school.