<span>unpleasant; compare themselves against high standards</span>
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.
<span>These attempts come from a number of places and concepts. First, it comes from direct experience. Second, traditions passed down over the years allow for us to learn about our pasts and histories. Next, direct inquiries that we have developed have led to discoveries. Finally, authority given to certain figures has allowed for them to make judgments about what is going on in the world.</span>