Yao Is Participating in a Study That Is Investigating Sleep

Yao is participating in a study that is investigating sleep patterns.As part of the study,researchers paste electrodes to Yao's scalp.The electrodes are then hooked up to an electroencephalograph (EEG) ,which will provide information about the ____.

A) specific areas of the brain involved with sleep
B) general electrical activity of the brain during sleep
C) changes in blood flow that occur within the brain during sleep
D) physical shape of the brain structures involved with sleep