Answer:
The correct answer is a. sugar
Explanation:
Even though caffeine is also known for uprising the energy levels to a point where it could cause insomnia, the excess of sugar usually causes an increase in heart rate and insomnia. Also, coca-cola has a bigger amount of sugar than caffeine, so it explains how these high quantities could affect Xi's health.
I think it’s C because if you’re allergic to one cillian than you’re allergic to all of them
Sorry if this is wrong
The most applicable answer would be D. Energy