How could the US. Constitution
have been different?

IT could have been totally different

Explanation:

How can the US Constitution be different?

To alter the Constitution, an amendment is proposed by Congress and requires a two-thirds majority in both the House and the Senate. Alternatively, two-thirds of the state legislatures can propose an amendment through a constitutional convention (however no amendment has followed this path so far).

answer; ///i believe that the correct answer is (b); ///the candidate must be a native born american citzen;