Why does Mr. Barrymore suddenly decide to tell Sir Henry and Dr. Watson what Sir Charles was doing on the night of his death?
a. Mr. Barrymore is grateful when they promise not to tell the police about the escaped convict.
b. Mr. Barrymore can no longer bear the guilt of keeping the secret to himself.
c. Mr. Barrymore wants them to do him a great but illegal favor.
d. Mr. Barrymore is sorry that he disobeyed Sir Henry the night before and is trying to get his job back.
