A Researcher Wants to Know Whether Eating Chocolate Makes People

A researcher wants to know whether eating chocolate makes people nervous. Some participants are given two bars of chocolate to eat and some are given no chocolate at all, and then all of the participants are tested for nervousness an hour later. In this experiment, the amount of chocolate eaten:

A) would be a dependent variable.
B) would be a placebo.
C) would be an independent variable.
D) may be either an independent or dependent variable.

Correct Answer:

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