3 questions for polygamy deniers

Brian C. Hales was on Thoughtful Faith (the Youtube channel) with Jacob Hansen. He had these 3 questions for those who deny Joseph Smith Junior taught and lives polygamy. They are correct. I am restating their questions. What are your answers?

Here is the Thoughtful Faith episode https://www.youtube.com/watch?v=jBFSwpfYvvI&t=1s