CONTEXT:
{context}

TASK TYPE: `match_letters`

QUERY:
{query}

This is a matching / multiple-choice letter task. Each QUERY item chooses among labeled options (A, B, C, ...).

REASONING ONLY for this turn:
1. Extract the mapping or rule set from CONTEXT.
2. For each QUERY item, evaluate the options against that rule set.
3. Note the answer format: only the chosen option letter (A, B, C, ...), uppercase — no option text.

You may draft candidates inside the reasoning. Do NOT write `FINAL ANSWERS:` and do NOT end with a bare answer list.