I think this one is correct. But I'm not 100 percent sure. I saw them on court papers and other types of contracts.
makes no sense to double the 'of'... use B or change second 'of' to 'in'... but why 'that' anyway?... doesn't make much sense, imo... what's the context?...
Neither. If you have "Month Year" there never is a comma. You could do "Month Day, Year." The comma in this case is used to separate the numbers but because you're separating words you don't need one. For the double "of" I bet your thinking something like "Ahh, I remember that 28th day of June of the nineteen hundredth and fifty-fourth year of our Lord." Though it would be better written with "in" instead of the second "of." "Ahh, I remember that 28th day of June in the nineteen hundredth and fifty-fourth year of our Lord."