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><image 1>: Elements of Website User Experience, Jesse James Garrett (2002) model. The model identifies five interdependent 'planes' with different levels of abstraction that together define the usability of a website. Which of the following options is not part of the model definition?
A. cooperate
B. scope
C. Structure
D. Strategy

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
A
<image 1>: Elements of Website User Experience, Jesse James Garrett (2002) model. The model identifies five interdependent 'planes' with different levels of abstraction that together define the usability of a website. Which of the following options is not part of the model definition?
A. cooperate
B. scope
C. Structure
D. Strategy

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