The nurse is discussing the HCP's recommendation for removal of life support with the client's family. Which information concerning brain death should the nurse teach the family?

B When putting cold water in the ear, if the client reacts by pulling away, this demonstrates brain death. C Tests will be done to determine if any brain activity exists before the machines are turned off. A Positive waves on the electroencephalogram (EEG) mean the brain is dead and any further treatment is futile. D Although the blood flow studies don't indicate activity, the client can still come out of the coma.