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>In port engineering survey, the cone settlement of a cohesive soil undisturbed sample (76g liquid limit instrument sinking into the soil) was measured The depth in is 6mm. Which of the following options does this viscous natural state belong to<image 1>
A. Hard plastic
B. Plastic
C. Soft plastic
D. Flow molding

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
In port engineering survey, the cone settlement of a cohesive soil undisturbed sample (76g liquid limit instrument sinking into the soil) was measured The depth in is 6mm. Which of the following options does this viscous natural state belong to<image 1>
A. Hard plastic
B. Plastic
C. Soft plastic
D. Flow molding

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