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"Carrie was getting less sleep during midterms so she began drinking one cup of coffee in the morning to feel more alert. By the end of the semester, Carrie was drinking three cups of coffee each morning to get the same sense of alertness. What has happened to Carrie

Respuesta :

Answer:

She has gained a tolerance to caffeine

Explanation:

By drinking coffee everyday, her body has gotten used to the elevated level of caffeine in the morning. This has raised her tolerance to it, making it harder to feel the same effect from a single cup.

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