You are speaking with your friend Oscar, who is Deaf, through his interpreter. About ten minutes into the conversation, you notice that he has become standoffish. He is crossing his arms, looking away, and is displaying other non-verbal cues that he is upset with you. Knowing what you know about communicating with a Deaf person, what is the most probable cause of his frustration with you? You have addressed all questions to his interpreter, rather than to Oscar. You have signed instead of spoken. You have incorrectly finger-spelled his name, which is considered very rude in the Deaf community. You have tried to sign but have also spoken along with your signs.