Xi needs to stay awake another hour to study for his english final, so he drinks several cups of cola. when he's done studying, he finds that he can't sleep even though he wants to, he feels agitated, his muscles twitch, his heartbeat is irregular, and he feels nauseated. what is causing xi to feel this way? caffeine insomnia narcolepsy sugar

Caffeine

Explanation:

The most likely reason for Xi to feel this way is caffeine. Caffeine is a chemical that is found in many drinks, such as coffee, tea and cola. Caffeine causes mental alertness, which is most likely the reason why Xi was drinking cola in order to stay awake. This occurs because caffeine stimulates the central nervous system, heart and muscles. However, it can also cause excessive urination, insomnia and dehydration, among other effects.

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