Question

a medical researcher prepares a number of doses of saline solution. this is a mixture of mineral salts and water that is absolutely safe to administer and has no medical effects whatsoever. the likely purpose of these doses is: a. for use as treatments in a blocked experiment. b. for testing as a cure for dehydration. c. for use as placebos. d. for use as treatments in a double - blind experiment. e. for a test of the hawthorne effect.

Explanation:

A placebo is an inactive substance with no medical effects. Saline solution, being a safe mixture with no medical effects, is commonly used as a placebo in medical research to compare against actual treatments.

Answer:

C. for use as placebos.