Which of the following is a possible side effect from ingesting too much caffeine, a stimulant used for alertness and endurance? a. nervousness b. insomnia c. shakiness d. all of the above

According to my information, your correct answer may actually be "all of the above" based on the fact that "Insomnia" would be a problem for a person that would be able not to sleep. And therefore, this would arouse nervousness and also shakiness which would then resolve to be "all of the above".

D. All of the above because if you think about it logically you can get nervous, have insomnia and shakiness although I don’t know if nervousness is completely true so maybe it is B and C