Antonio has been flying between New York and Madrid every week for the last year and often suffers from jet lag. One treatment suggested in your book is:

In Stage __________, a new brain wave begins to appear. __________ waves are very large and slow and signal deeper sleep and a further loss of consciousness.

a. one; Alpha b. two; Delta c. three; Delta d. four; Alpha

In comparing the relative toxicity of marijuana and cocaine, it is important to take into account

A. the user's gender. B. availability and price. C. urban vs. rural environment. D. that many more people use marijuana than use cocaine.