What did the federalists agree to in order to gain support for the new constitution? putting the capital in richmond, virginia making john adams the first president allowing the states to control foreign trade adding amendments to protect basic rights

The correct answer is "adding amendments to protect basic rights".

The whole process that leads to the issue of the Constitution of the United States took approximately 3 and a half years and ended on November 15, 1777. With the Constitutional Congress passing the Articles of the Confederation.

Among the issues that were heavily discussed as state representation, as smaller states wanted equal representation in number in comparison to other states and bigger states want representation proportional to the population. However, another big issue was the assurance of basic rights in the form of Amendments in the Constitution. This was widely agreed and supported, as the whole basis for obtaining independence was "freedom" from foreign powers, but also the presence of someone's creed and security, which were things that lacked in Europe and motivated various migrants to come to America.  

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