A male client is admitted to the unit with a possible diagnosis of delirium. Which statement by the client's wife best supports the diagnosis?

"Since his mother died, he has not been feeling well."

"My husband just didn't seem to know what he was doing. He has been forgetful for years."

"The changes in his behavior came on so quickly! I wasn't sure what was happening."

"This is supposed to happen when you get old, right?"