A patient with an advanced neurological condition is being assessed for end-of-life decision-making. The nurse is explaining the role of an EEG in confirming brain death. Which of the following statements by the nurse is most appropriate?

"An EEG can be used alone to determine if brain activity is still present in patients who are unresponsive."

"An EEG is not needed to determine brain death as clinical signs are sufficient."

"The EEG will confirm brain death when no electrical activity is present in the brain."

"An EEG may show normal brain activity in patients who are close to brain death."