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>Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, E, at the end.
Question: The horizontal and vertical distances between adjacent points equal $1$ unit.  The area of triangle $ABC$ is

<image1>
Choices:
(A) 1/4
(B) 1/2
(C) 3/4
(D) 1
(E) 5/4 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
B
Hint: Please answer the question and provide the correct option letter, e.g., A, B, C, D, E, at the end.
Question: The horizontal and vertical distances between adjacent points equal $1$ unit.  The area of triangle $ABC$ is

<image1>
Choices:
(A) 1/4
(B) 1/2
(C) 3/4
(D) 1
(E) 5/4 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