If you are going to have a blind date with someone named Sam, and your friend says that Sam had testicles, what do you know about Sam that is male?

Anna Freud viewed the teenage years as a

A) period so turbulent that it resembles the era in which humans evolved from savages into civilized beings. B) time in which teenagers grasp scientific and mathematical principles and grapple with social and political issues. C) pleasant time of life in which the social environment is responsible for the range of teenage experiences. D) biologically based "developmental disturbance."

What is the best example of a "system" as that term is defined in your text?

a. A network of computers that are all connected to each other b. A classroom of students listening to a professor lecture c. A rainforest in which different species of plants and animals depend on each other d. A building in which all the different forms of structural support keep it standing