If a scientist wants to design an experiment to measure the effect of vitamin C on colds, which would be an appropriate placebo?

Question

Quizplus · Accepted Answer

The best choice for a placebo in this experiment would be a sugar pill that does not contain vitamin C. This helps to ensure that any observed effects are not simply due to the placebo effect or other factors unrelated to the vitamin C being tested. Choices A, B, and C all contain vitamin C, which would not be an appropriate placebo as it would be considered an active treatment, potentially confounding the results of the experiment.

If a Scientist Wants to Design an Experiment to Measure