Explain the difference between closed-fact and open-fact situations. A. In a closed-fact situation, the facts have not yet occurred, and the tax advisor's task is to plan them or shape them into a favorable tax result. In an open-fact situation, the facts have occurred, and the tax advisor's task is to analyze them to determine the appropriate tax treatment. B. In a closed-fact situation, the facts have occurred, and the tax advisor's task is to analyze them to determine the appropriate tax treatment. In an open-fact situation, the facts have not yet occurred, and the tax advisor's task is to plan them or shape them into a favorable tax result. C. In a closed-fact situation, the facts have occurred, and the tax advisor's task is to plan or shape the facts into a favorable tax result. In an open-fact situation, the facts have not yet occurred, and the tax advisor's task is to analyze them to determine the appropriate tax treatment. D. None of the above.