Which code represents Charleston, South Carolina?

The code that represents Charleston, South Carolina is B. CHS.

CHS is the IATA airport code for Charleston International Airport, which serves the Charleston area. IATA codes are three-letter designations used to identify specific airports and locations worldwide, and each code is unique to a particular site. In this case, CHS is derived from the name Charleston, providing a direct correlation between the code and the city it represents.

The other choices represent different airports unrelated to Charleston; for instance, CLT is the code for Charlotte Douglas International Airport in North Carolina, BWI stands for Baltimore/Washington International Thurgood Marshall Airport in Maryland, and CMH refers to John Glenn Columbus International Airport in Ohio. By recognizing these unique codes, travelers can more easily identify their destinations and points of departure within the aviation system.