How did the promise of a bill of rights seal the deal and create the constitution?

Because the anti-federalist would not sign unless a Bill Of Rights was added to the constitution so the Bill of Rights was the reason that the deal was sealed.

but whats the question? ?

explanation:

the virginia plan called for three branches of government and two houses of congress. representation in each house would be determined by population. the new jersey plan called for three branches of government and a single house of congress. each state would have an equal vote.