Your Grandfather Is Undergoing a Series of Tests at the Local

Your grandfather is undergoing a series of tests at the local hospital. During his last visit, he asked the physician to write the names of the tests because he wanted to ask you about them. One of the tests is a polysomnography. What your grandfather expect to happen during this test?

A) A number of physiological indicators will be recorded while he sleeps.
B) Using radio waves, the hospital will record his heart beat throughout a typical day.
C) He will be asked a number of verbal and quantitative questions while his brains waves are recorded.
D) His stress reactions will be assessed by taking small amounts of blood throughout the day, which will reveal his level of stress hormones.