An Elderly Man Who Lives with His Adult Son Was

An elderly man who lives with his adult son was diagnosed a year ago with early-stage Alzheimer's disease. The physician never discussed alcohol. The man gets angry when the son discusses his condition, and he drinks. The father drank all his life, but neither man considered it a problem. What does this information suggest?

A) The man has a co-occurrence of Alzheimer's disease and alcoholism.
B) The man very likely has an AUD and alcohol-related dementia.
C) The man is at risk for an AUD but probably does not have one.
D) The son is in denial about his father's alcoholism.