The first true words occur at

Alex is listening to a lecture on the history of opiate drugs, and he learns something that he finds very surprising. What has he heard the lecturer say?

a. "Heroin is a synthetic opiate made from morphine." b. "Heroin has actually been legally available by prescription in the U.S. for years." c. "Heroin is a synthetic drug that was originally developed as an antidepressant." d. "Heroin is not really an opiate because it is synthetic and does not actually come from poppies."

Matt realizes that whether he pours his lemonade into a large cup or a medium one, the amount is still the same. This illustrates what Piaget calls:

A) associativity. B) conservation. C) hypothetical-deductive thinking. D) seriation.