The Main Difference Between Electroencephalography (EEG) and Event- Related Potentials

The main difference between electroencephalography (EEG) and event- related potentials (ERPs) is

A) They do not use the same equipment, but they measure the same thing
B) The same equipment is used, but EEG measures small changes in electrical activity and ERPs measure large changes in electrical activity
C) There are no differences, essentially both techniques are used just to be sure that accurate results are obtained
D) The same equipment is used, but EEG recordings are taken while the person is at rest and ERPs are measured when the person is presented with a stimulus