A scientist was investigating hangover cures. From the information he collected, he identified various treatments including several over counter painkillers, several different herbs, B vitamins, water, and hair of the dog that might serve as a cure for a hangover. In order to test his hypothesis he should first:Group of answer choicesRound up a bunch of people with hangoversNo, he should get subjects drunk in a conrolled environmentGet a bunch of different kinds of liquorUse only pure, distilled ethanols