Which sentence shows that the author disagrees with people about relying on dopamine?
(A)
"According to new research, dopamine is what keeps people who
don't get enough sleep from conking out."
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B)
"The results showed that when the volunteers stayed up all
night, dopamine levels increased in two parts of the brain: the
striatum and the thalamus."
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"Higher levels of dopamine, the study suggested, kept the
volunteers awake even though they felt tired."
D
"Even when people think they feel OK, exhaustion makes it
difficult for them to learn or think as well as they can when
they're rested."
lational
Laboratory

D ) "Even when people think they feel OK, exhaustion makes it  difficult for them to learn or think as well as they can when  they're rested."

Explanation:

In her science article "The Chemistry of Sleeplessness," Emily Sohn went into detail to reveal how brain chemicals are related to how a person reacts externally. The article focuses on the issue of a brain chemical helps in keeping a person active even when he is really tired.

According to the author, she revealed that several types of research support the fact that dopamine helps a person who is tired and sleepless. It "kept the volunteers awake even though they felt tired" and also "keeps people who don't get enough sleep from conking out." But the author chooses to disagree, saying that "even when people think they feel OK, exhaustion makes it difficult for them to learn or think as well as they can when they're rested."

Thus, the correct answer is option D.

explanation:

d the picture of the plane

the answer should be the first one. "many people find his lyrics very moving."

it by far makes the most grammatical sense and is very objective, removing any first person from the original sentence and keeping with the sentence fluency.