You won't get an honest answer from none of them....the fact that Abraham was saved and justified by faith long before he offered Isaac shoots down his working for dogma.....If he states Abraham would have made the kingdom had he died before he offered Isaac...well, his farce is known....
The work of Abraham did not have some kind of intrinsic merit to save his soul, but it proved or manifested the genuineness of his faith. This is the sense in which Abraham was "justified by works" (James 2:21). He was shown to be righteous.
We always need to keep in mind that James is discussing the proof of faith (says-claims to have faith but has no works/I will show you my faith by my works - James 2:14-18) and not the initial act of being accounted as righteous with God (Romans 4:2-3).