Coin-Shaped Electrodes Are Pasted onto Miranda's Scalp, and They Are

Multiple Choice

Coin-shaped electrodes are pasted onto Miranda's scalp, and they are connected by wires to a machine that translates the electrical energy from her brain into wavy lines on a monitor. From this description, it is evident that Miranda's brain is being studied with the help of:

A) positron-emission tomography.
B) functional magnetic resonance imaging.
C) transcranial direct current stimulation.
D) an electroencephalogram.