B. It says there might be lawsuits and contests, not that the GOP has to allow it to happen. From the article:
It is possible for parties and election authorities to change or work around these deadlines. For instance, in 2020, the Republican National Convention took place after the deadlines in Alabama and Ohio. In Ohio, the state legislature passed a law to change the deadline that cycle so it took place after the Republican National Convention, and in Alabama, the state's election authority accepted a placeholder letter from the RNC that said the party would certify a nominee once the official nomination took place.
It is also possible that changing the Democratic nominee could draw lawsuits related to ballot access. On June 21, 2024, the Heritage Foundation said it would file lawsuits in Georgia, Nevada, and Wisconsin if Democrats nominated someone other than Biden.
If it is a red state, then they could simply refuse. You do realize that there were a couple of states that were trying to keep Biden off of the ballot using the existing deadlines as a method, right???
Yes, and those issue are resolved. Ohio passed legislation to push the date out and Alabama accepted a resolutution saying they would certify Biden. If the red states can refuse anyone, then they would just refuse Biden to begin with. There are legislative deadlines for these things, and all but one is after the DNC, so they would have to sue on very shakey ground. An article from a month does not prove that, it just means the source is behind or did not update the article.
Exactly what do you think is going to happen when you try to swap in someone else? The Republicans are known for acting in good faith. I'm sure nothing bad would happen.