Many infants begin "sleeping through the night" around four months. A couple of months later they may begin waking during the night again. Why?

Which of the following is NOT included as part of Freud's structure of the mind?

a. Id b. Psyche c. Superego d. Ego

Globally, those over the age of 65 will outnumber those under 5 by the year ______.

a. 2020 b. 2025 c. 2035 d. 2050