What does paragraph 3 mainly talk about?A. Differ

What does paragraph 3 mainly talk about?

A. Different effects of caffeinated coffee and decaf on sleep.

B. Different findings of Lotan Shilo and a team about caffeine.

C. The fact that the subjects slept 415 minutes per night after drinking decaf.

D. The proof that the subjects took half an hour to fall asleep.

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