Answer:
c. incentive.
Explanation:
Based on the information provided within the question it can be said that this sudden change shows the effects of incentives within the experiment. This term refers to a constant motivator for the test subjects which is a reward that the test subjects get if they perform a desired action or outcome. Which in this case the food reward was the incentive that the rats wanted in order to complete the complex maze with less errors.
Kennedy, Carter, and Jackson.
