A: If you are deciding between just 2 things, you can usually just phrase the question as “should we do thing A?” but if choosing between 3 things, use just the Answer cards that say Yes, No, and Solid Maybe. Assign meanings to each: Yes = Choice A, No = Choice B, and Solid Maybe = Choice C.
Depending on the options you are choosing between, there will usually be a logical enough reason to assign Yes or No to a particular choice, with the others hopefully falling into place. If not, consider if any of the other Answer cards might make a better stand-in for the choice you are representing.
Then shuffle the answers and place them face down, and consult the Oracle just as you would for any other three possible answers.