What difficulty does the passage mention about starting school later?

Teenagers tend to fall asleep later and wake later than younger children, a pattern that scientists link to changes in the body's internal clock during adolescence. In some countries, schools have moved the start of the day by an hour. Early reports describe fewer students arriving late and fewer who fall asleep in class. However, a later finish can clash with sports practice and with parents' working hours, so not every community finds it easy to change. Some experts suggest a smaller step: keep the start time but avoid scheduling exams in the first period.

Answer and explanation

Correct answer: C. A later finish can conflict with sports practice and working hours

  1. Step 1: The passage says a later finish can clash with sports and parents' work. Step 2. That is the stated difficulty. Answer: A later finish can conflict with sports practice and working hours. Why not the others: The other difficulties are invented.

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