Marshall ate a hamburger he purchased from his favorite fast food restaurant. an hour later his stomach became very upset and he spent the rest of the evening vomiting. a week later he entered the restaurant and immediately became nauseous when he saw a hamburger. marshall's nausea when he saw the hamburger is an example of:

Marshall’s nausea when he saw the hamburger is an example of classical conditioning. The classical conditioning happens when neutral stimulus which had happened before is connected with a potent stimulus. It is seen in the scenario of when Marshall had experienced vomiting because of the hamburger, after having to see another one made him react to the stimulus.

answer; i believe two are ; /// world bank and international monetary fund; good luck

the first question's answer is a.