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>Many of Frederic Leighton's early paintings took their inspiration from the Renaissance art historian Giorgio Vasari's text The Lives of the Artists. It includes <image 1> that shows the death of which famous figure?
A. Cimabue
B. Donatello
C. Giotto
D. Brunelleschi

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
D
Many of Frederic Leighton's early paintings took their inspiration from the Renaissance art historian Giorgio Vasari's text The Lives of the Artists. It includes <image 1> that shows the death of which famous figure?
A. Cimabue
B. Donatello
C. Giotto
D. Brunelleschi

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