Laws and institutions no matter how efficient and well-arranged must be reformed or abolished if they are unjust
I shall even assume that the parties do not know their conceptions of the good
The fundamental agreements reached in it are fair
1. Many years ago I had a copy, but I grew disenchanted about 1/3 of the way through and recycled it. This from 2008 (see the comments) provides some discussion, but clearly I hadn't read it by then. Thx Mfd+J for loan of their copy.
2. Lest this example be thought utterly implausible, proponents of colonialism could argue for B.
3. I, of course, subscribe to Hobbes' defn of Just. We may also wish to consider Hayek on the matter: "The test of the justice of any particular rule is thus whether its universal application is possible because it proves to be consistent with all the other accepted rules" (see here; Essays on Liberalism and the Economy, Volume 18).