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> is the HRM Roles, David Ulrich (1997) model. According to Ulrich, if HR is to become and remain relevant in the current business environment, what is not something HR professionals must learn?
A. Manage human resources operations and infrastructure
B. Become the link between human resources and organizational strategy
C. Optimize the value of employees
D. Be a change agent with a long-term vision for the organization

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
<image 1> is the HRM Roles, David Ulrich (1997) model. According to Ulrich, if HR is to become and remain relevant in the current business environment, what is not something HR professionals must learn?
A. Manage human resources operations and infrastructure
B. Become the link between human resources and organizational strategy
C. Optimize the value of employees
D. Be a change agent with a long-term vision for the organization

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