Which of the following is the leading cause of death in the United States of American according to a 2001 study?

A patient's chart indicates that his headache pain is described as "piercing" and "excruciating." The pain comes on abruptly, and the use of alcohol or lying down can bring on the pain. Which type of headache is described here?

a) cluster b) tension c) migraine d) muscle contraction

A researcher measured participants' baseline level of physical activity, then measured activity after receiving information about the positive effects of exercise. In this design, the "A" is _____ and the "B" is

a) an existing activity; an activity after getting information about exercise b) an activity after getting information about exercise; an existing activity. c) the posttest; the pretest. d) the treatment; the pretest.