Which result did teachers report after the change?

Many teenagers complain that they cannot fall asleep before eleven at night, yet they must be at school by half past seven. Sleep researchers say this is not simply laziness. During the teenage years the body clock shifts, so young people feel sleepy later in the evening and wake naturally later in the morning. Experts suggest that most teenagers need between eight and ten hours of sleep, but a typical school week gives them far less. One school in a large city tested a simple change: it moved the start of the school day forty-five minutes later for one term. Teachers reported that learners arrived on time more often and fell asleep in class less frequently. The research team was careful, however, not to claim that a later start would solve every problem. Results from a single school, they warned, cannot be assumed to apply everywhere, and more studies are needed before any national rule is considered.

Answer and explanation

Correct answer: D. Learners arrived on time more often and fell asleep in class less frequently

  1. Step 1: Teachers reported better punctuality and less sleeping in class.
Answer
Learners arrived on time more often and fell asleep in class less frequently.
Why not the others: Learners achieved higher marks in all subjects: marks are not mentioned. Fewer learners attended school: attendance did not fall according to the passage. Teachers had to work longer hours: this is not reported.

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