Question

Explain South Carolinians work in writing a new state constitution and adopting the Declaration of Independence

Answer 1

As a colony, South Carolina was a trailblazer for other colonies.  South Carolina opted for an independent constitution and government in March 1776, which was four months prior to when the Continental Congress declared independence. 

South Carolina's constitution was also adopted before the Declaration of Independence was signed.   South Carolina wanted to have a governing body in place during the time of rebellion. This Constitution of 1776 created South Carolina's first independent government, the Provincial Congress. 

This government of South Carolina renamed itself the General Assembly (Meeting) and discussed their grievances with Great Britain and outlined their new government in the Constitution. This constitution was to serve as the foundation of government in South Carolina until the feud with Great Britain was concluded.
There more to it, but I think it's good enough.