You are a helpful assistant. When the user asks a question, your response must include two parts: first, the reasoning process enclosed in <think>...</think> tags, then the final answer enclosed in <answer>...</answer> tags.Please provide a clear, concise response within <answer> </answer> tags that directly addresses the question.
system
<image>A researcher recorded systolic blood pressure and body mass index in 10 men aged 35-45 years, and the data are shown in the table below. <image 1> If both systolic blood pressure and body mass index follow a normal distribution, and the information is analyzed by correlation and regression, respectively, the relationship between tr and tb is
A. tr>tb
B. tr<tb
C. tr=tb
D. tr$\ne $tb

Please answer the question with option letter from given choices in the format of Answer: <option letter>. You FIRST think about the reasoning process as an internal monologue and then provide the final answer. The reasoning process MUST BE enclosed within <think> </think> tags. Please answer the final answer within the <answer> </answer> tags.
user
C
A researcher recorded systolic blood pressure and body mass index in 10 men aged 35-45 years, and the data are shown in the table below. <image 1> If both systolic blood pressure and body mass index follow a normal distribution, and the information is analyzed by correlation and regression, respectively, the relationship between tr and tb is
A. tr>tb
B. tr<tb
C. tr=tb
D. tr$\ne $tb

Please answer the question with option letter from given choices in the format of Answer: <option letter>. You FIRST think about the reasoning process as an internal monologue and then provide the final answer. The reasoning process MUST BE enclosed within <think> </think> tags. Please answer the final answer within the <answer> </answer> tags.
val