In the Textbook Case of Arthur, He Said That He

In the textbook case of Arthur, he said that he had a "secret plan to save all the starving children in the world." After Arthur showed other bizarre behavior and said he was going to climb the fence of a government building, his parents tried to have him admitted to a psychiatric hospital. They were not able to do that because

A) he was not considered a danger to himself or others.
B) he was given medication, instead, to calm him down.
C) the hospital staff didn't believe his parents.
D) his behavior was due to a substance abuse problem.