God is absolutely sovereign.
Sin is contrary to God's will.
The best I can make out of your 4344 is that you are saying "it's a mystery." Is that true?
In 4363 you just outlined the possibilities. I don't remember you picking one.
SD
God is absolutely sovereign.
Sin is contrary to God's will.
I believe that, in an act of His divine sovereignty, God empowered man with a truly free will. This free will is in practice quite limited in scope (we can't "will" things into existence, as God can). But within the scope in which we operate, our will, and thus our choices, are truly free.
I'll make one of my famously poor analogies here. We are on a ship. God's will is the ocean on which we sail. God created the ship and us. He is the captain of the ship. Within the confines of the ship, we can do whatever we like. We can obey our captain, or we can mutiny against him. We can work together, or we can fight one another. And we can be rewarded with dinner with the captain, or we can be thrown into the brig.
Contrary to what some Calvinists have expressed, I don't believe that the exercise of our will somehow diminishes God's sovereignty. Our will, freely operating within the ship, remains vastly smaller -- and contained within -- the will of God. We operate in the space He permits. He still steers the ship.
God's will for us is expressed in His commandments. We sin when we disobey Him, when we set our will against His. In this way, sin is contrary to God's will.
I believe a truly free will is necessary for there to be true moral responsibility for our choices and actions. You don't "punish" your computer for following its programming. If a piece of code fails, it is the fault of the programmer, not the software. For punishment of sin to be just, it must be for that which we are truly responsible. And we are only truly responsible if we truly had a choice.