Randy won a $10 T-shirt with his college’s name on it. At an event, a student offered to buy it from Randy. Randy said he would sell it for no less than $20. Randy’s perception of the T-shirt’s worth is an example of

Cognitive psychologists are concerned with the scientific study of ______

a. psychosocial development b. observable behaviors c. mental processes d. self-actualization

What contains antibodies and other substances that strengthen the baby's immune system?

a. formula that contains supplements b. solutions that are injected into the baby c. vitamin supplements for infants d. breast milk