An investigator wanted to see whether packaging information affects the way teenagers rate the effectiveness of soap. The same soap was put in three packages: (a) a pink wrapper that says "For Keeping Your Skin Baby Soft"; (b) a red wrapper that says "For Eliminating Acne"; and (c) a white wrapper that says nothing. Each teenager was asked to rub his or her face with dirt and wash with soap A; the same procedure was followed for soaps B and then C. The time it took to get the face clean was recorded each time. What is the intended independent variable? A) SoapB) Soap effectivenessC) Packaging informationD) The identity of the teenager
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