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>Suppose you have trained an SVM classifier with a Gaussian kernel, and it learned the following decision boundary on the training set:<image 1>You suspect that the SVM is underfitting your dataset. Should you try increasing or decreasing C? Increasing or decreasing $\sigma^2$?
A. It would be reasonable to try decreasing C. It would also be reasonable to try increasing $\sigma^2$.
B. It would be reasonable to try decreasing C. It would also be reasonable to try decreasing $\sigma^2$.
C. It would be reasonable to try increasing C. It would also be reasonable to try decreasing $\sigma^2$.
D. It would be reasonable to try increasing C. It would also be reasonable to try increasing $\sigma^2$.

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
Suppose you have trained an SVM classifier with a Gaussian kernel, and it learned the following decision boundary on the training set:<image 1>You suspect that the SVM is underfitting your dataset. Should you try increasing or decreasing C? Increasing or decreasing $\sigma^2$?
A. It would be reasonable to try decreasing C. It would also be reasonable to try increasing $\sigma^2$.
B. It would be reasonable to try decreasing C. It would also be reasonable to try decreasing $\sigma^2$.
C. It would be reasonable to try increasing C. It would also be reasonable to try decreasing $\sigma^2$.
D. It would be reasonable to try increasing C. It would also be reasonable to try increasing $\sigma^2$.

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