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As part of a science experiment, a group of 50 people are given Drug X, a group of 25 people are given Drug Y, a group of 10 people are given Drug Z, and a group of 25 people are given a placebo. Which of the groups would be considered an experimental group?A. Those that took Drug X.B. Those that took the placebo.C. Those that took Drug X and those that took Drug Y.D. Those that took Drug X, those that took Drug Y, and those that took Drug Z.

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