### Output Format:
You must output valid JSON. Do not add markdown or conversational text. Three fields:
- **answer**: Answer to the problem. Letter identifying which of the described images best completes the sequence matrix presented on the question image. Analysis of the sequence should focus on comparisons between shapes, colors, orientations, and relations in rows and columns of the matrix.
- **confidence**: Confidence in your answer, ranging from 0.0 to 1.0. (1.0 meaning absolutely confident, 0.5 meaning not so sure, 0 meaning purely guessing, etc.)
- **rationale**: Short rationale for your answer.

### Example:
{
    "answer": "C",
    "confidence": 0.97,
    "rationale": "Sample explanation based on observations",
}
