Which of the Following Statements Is Accurate

Multiple Choice

Which of the following statements is accurate?

A) to guard against the "Hawthorne effect" in medical research scientists will give a placebo to the experimental group
B) to guard against the "Hawthorne effect" in medical research scientists will give the experimental group the independent variable
C) to guard against the "Hawthorne effect" in medical research scientists will give a placebo to the control group
D) there is no way to guard against the "Hawthorne effect" in medical research