In what year did South Carolina ratify the U.S. Constitution?

What is the two-letter postal abbreviation for South Carolina? Which state uses the postal abbreviation "SC"? Columbia is the capital of which state? What is the largest city in South Carolina by population? What is the official nickname of South Carolina? What is the state bird of South Carolina? What is the state flower of South Carolina? What is the two-letter postal abbreviation for South Dakota?