This question tests the preposition that follows the adjective "accountable" when referring to responsibility for one's actions.
- Option A (For): "Accountable for" is the standard collocation meaning responsible for something one has done. This matches the sentence.
- Option B (About): "Accountable about" is not a recognized usage in English.
- Option C (Of): "Accountable of" is grammatically incorrect.
- Option D (Against): "Accountable against" does not exist as a standard collocation.
The correct answer is A) For, so option 1 is the answer.