Instructions: In this task, you will be presented with a multiple-choice question in Persian, and you should answer the question based on your knowledge. Classify the answers based on options.
Input: تشکیل دولت کدام نخست وزیر در ایران به « کابینه سیاه » مشهور شد؟ <sep> (A) قوام السلطنه (B) سید ضیاءالدین طباطبایی (C) وثوق الدوله (D) مشیرالدوله
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
B