Which of the following statements by a client indicates adequate understanding of preparation for electroencephalography?

The client needs to wash his hair to remove hair spray, cream, or oil that might interfere with attaching the electrodes to the scalp. Food or fluids do not need to be restricted, with the exception of caffeinated fluids. There is no restriction on metal objects. Aspirin is not a medication that needs to be held before the test (just anticonvulsants, tranquilizers, barbiturates, and other sedatives).Reduction of Risk Potential