What's the purpose of your visit? - __ A. Nothing. B. Sightseeing. C. It's none of your business. D. It's personal.

The correct answer is C. It's none of your business.<br /><br />The question is asking for the purpose of the person's visit, and the options provided are:<br /><br />A. Nothing.<br />B. Sightseeing.<br />C. It's none of your business.<br />D. It's personal.<br /><br />Option C, "It's none of your business," is the correct answer because it indicates that the person does not want to disclose the purpose of their visit to the person asking the question. This option is the most appropriate response in this context, as it clearly conveys the person's intention to keep their purpose private.<br /><br />Options A, B, and D do not accurately reflect the person's intention to keep their purpose private. Option A, "Nothing," is a vague response that does not provide any information about the purpose of the visit. Option B, "Sightseeing," is a specific reason for visiting, but it does not indicate that the person does not want to disclose their purpose. Option D, "It's personal," is a vague response that does not provide any information about the purpose of the visit.<br /><br />Therefore, the correct answer is C. It's none of your business.