When a researcher has some degree of control over the independent variable, but not full control, the type of research is called

Andrea is the mother of Leo, a six-month-old child. She wants to introduce vegetables in Leo's diet. As Leo is used to having lentil soup as his evening snack, Andrea prepares lentil soup with vegetables in it and makes Leo taste it. He does not like the taste of the soup and refuses to have it. After that day, he refuses to have even plain lentil soup. In this scenario, which of the following acts as the conditioned stimulus?

A. the soup B. the vegetables C. Leo D. Andrea

Your last dream of the night is likely to

a. have the weakest connection to events of the previous day. b. have the strongest connection to events of the previous day. c. anticipate the events of the coming day. d. be the hardest to remember. e. occur about two hours before you awaken.