Which statement best describes the text's tone?
Researchers have long suspected that sleep helps the brain store new information. In one experiment, two groups learned a list of word pairs. One group slept for eight hours afterwards, and the other stayed awake. The next day the sleeping group recalled clearly more word pairs. The scientists concluded that sleep supports the transfer of memories from short-term to long-term storage. They added that the study was small and should be repeated before firm conclusions are drawn.
Answer and explanation
Correct answer: A. Careful and balanced
- Step 1: The authors report the result and then warn that more studies are needed. Answer: Careful and balanced. Why not the others: The other tones do not fit.
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