A(n) __________ refers to a substance or treatment that is often used in an experiment but does not have an actual medicinal or experimental benefit. A. extraneous variable B. placebo C. confounding variable D. independent control  

Respuesta :

A(n) B. Placebo refers to a substance or treatment that is often used in an experiment but does not have an actual medicinal or experimental benefit.

The "Placebo" is a type of "Medicine" that does not actually contain medicine, and is used to trick the users mind into solving the problem they have.

Answer:

B. Placebo

Explanation:

In science it shows that placebo is the thought that something is working.