Researchers have found that nicotine, one of the main substances in cigarettes, indirectly releases dopamine, which produces a "feel good" sensation in people who smoke. based on this finding, nicotine would be an example of a/n

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous