When Pavlov’s dog salivated to a bell in the absence of food, the salivation was the

One of the reasons that diets often do not work is that dieting ____

a. ?increases the body’s level of leptin, which tends to increase hunger b. ?causes CCK to be secreted earlier and the hypothalamus to become overworked c. ?shuts down the endocrine system, making it easier to gain weight from less food d. ?leads to hunger and decreases the rate at which our bodies burn energy

Larry is talking to his ten-month-old son. He wants his son to call him "daddy" and he keeps repeating the word "daddy" to his son. He is delighted when his son responds with "dada." In this scenario, Larrys's son is:

A) cooing. B) babbling. C) humming. D) murmuring.