One of your very best clients introduces you to his son and then, one week later, is injured in an accident and is totally paralyzed and unable to speak. The son calls you and enters an order for his father's account that is entirely consistent with your client's trading habits. As an agent, you would A) visit your client in the hospital and ask him to squeeze your hand if he wishes to go ahead with the trade B) follow the son's instructions C) refuse the trade without a signed power of attorney D) act in accordance with the client's last will and testament