Your client Silvia comes to therapy upset because she overheard her neighbor stating that he plans to shoot the mayor tomorrow evening and owns a gun. She tells you she has tried to calm him down, but he just "keeps blaming the system for his unemployment." What is your legal obligation?

A. Call the police and notify the mayor.

B. Discuss options that Silvia has to prevent harm to the mayor.

C. Call the police and inform them of the imminent danger.

D. Maintain confidentiality.