Question: South Carolina Highway 700 (SC 700) is a state highway in the U.S. state of South Carolina, known for most of its length as Maybank Highway, the state highway runs 20.38 mi from a dead end in Rockville east to U.S. Highway 17 (US 17) in which location, which location, is the oldest and largest city in the U.S. state of South Carolina, the county seat of Charleston County, and the principal city in the Charleston–North Charleston–Summerville Metropolitan Statistical Area?

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Charleston, South Carolina metropolitan area: The Charleston metropolitan area is centered on Charleston, South Carolina.  The U.S. Office of Management and Budget designates the area as the Charleston–North Charleston, SC Metropolitan Statistical Area, a metropolitan statistical area used for statistical purposes only by the United States Census Bureau and other federal agencies.  The OMB defines the area as comprising Berkeley, Charleston and Dorchester counties, an area with 664,607 in the 2010 census (though a July 1, 2012 estimate placed the population at 697,439).  Principal cities include Charleston, North Charleston, and Summerville.  The area is commonly referred to as the Tri-County Area or the Lowcountry, though the latter term has historically referred to South Carolina coast in general.

Mount Pleasant, South Carolina: Mount Pleasant is a large suburban town in Charleston County, South Carolina, United States.  It is the fourth largest municipality and largest town in South Carolina, and for several years was one of the state's fastest-growing areas, doubling in population between 1990 and 2000.  The population was 67,843 at the 2010 census, and the estimated population in 2014 was 77,796.  Mount Pleasant is the third largest city in the Charleston – North Charleston – Summerville metropolitan area, behind Charleston and North Charleston.

U.S. Route 17 in Virginia: U.S. Route 17 (US 17) is a part of the U.S. Highway System that runs from Punta Gorda, Florida to Winchester, Virginia.  In Virginia, the U.S. Highway runs 255.83 mi from the North Carolina state line in Chesapeake north to its northern terminus at US 11, US 50, and US 522 in Winchester.  US 17 is a major highway in the eastern half of Virginia.  The U.S. Highway connects the Albemarle Region of North Carolina with the Hampton Roads metropolitan area.  Within the urban area, US 17 passes through the South Hampton Roads cities of Chesapeake, Portsmouth, and Suffolk and the Virginia Peninsula city of Newport News.  Between Yorktown and Fredericksburg, the U.S. Highway serves as the primary highway of the Middle Peninsula.  At Fredericksburg, US 17 leaves the Atlantic coastal plain; the highway passes through the Piedmont town of Warrenton and crosses the Blue Ridge Mountains on its way to Winchester in the Shenandoah Valley. The route from Tappahannock to Winchester roughly follows the Confederate March during the Civil War to Gettysburg

Charleston, South Carolina: Charleston is the oldest and largest city in the U.S. state of South Carolina, the county seat of Charleston County, and the principal city in the Charleston–North Charleston–Summerville Metropolitan Statistical Area.  The city lies just south of the geographical midpoint of South Carolina's coastline and is located on Charleston Harbor, an inlet of the Atlantic Ocean formed by the confluence of the Ashley and Cooper rivers.  Charleston had an estimated population of 134,385 in 2016.  The estimated population of the Charleston metropolitan area, comprising Berkeley, Charleston, and Dorchester counties, was 761,155 residents in 2016, the third-largest in the state and the 78th-largest metropolitan statistical area in the United States.

U.S. Route 701: U.S. Route 701 (US 701) is an auxiliary route of US 1 in the U.S. states of South Carolina and North Carolina.  The U.S. Highway runs 171.45 mi from US 17 and US 17 Alternate in Georgetown, South Carolina north to US 301, North Carolina Highway 96 (NC 96), and Interstate 95 (I-95) near Four Oaks, North Carolina.  US 701 serves the Pee Dee region of South Carolina and the southern and central portions of Eastern North Carolina.  The highway connects Georgetown and Conway in South Carolina with the North Carolina cities of Whiteville, Elizabethtown, Clinton, and a short distance north of its terminus, Smithfield.  US 701 has four business routes in North Carolina, including those through Tabor City, Whiteville, Clarkton, and Clinton.

North Charleston, South Carolina: North Charleston is the third-largest city in the U.S. state of South Carolina, with incorporated areas in Berkeley, Charleston, and Dorchester counties.  On June 12, 1972, the city of North Charleston incorporated and was the ninth-largest city in South Carolina.  As of the 2010 Census, North Charleston had a population of 97,471, growing to an estimated population of 108,304 in 2015, and with a current area of more than 198.5 km2 .  As defined by the U.S. Office of Management and Budget, for use by the U.S. Census Bureau and other U.S. Government agencies for statistical purposes only, North Charleston is included within the Charleston–North Charleston–Summerville metropolitan area and the Charleston-North Charleston urban area.  North Charleston is one of the state's major industrial centers and is the state's top city in gross retail sales.

South Carolina Highway 517: South Carolina Highway 517 (SC 517, aka Isle of Palms Connector or Clyde Moultrie Dangerfield Highway) is a 3.8 mi long state highway in the eastern part of the Charleston, South Carolina metropolitan area.  It exists completely within Charleston County, in the southeastern part of the U.S. state of South Carolina.  The highway travels in a southeast-northwest orientation from Isle of Palms to Mount Pleasant.  Most of the highway consists of the Isle of Palms Connector Bridge.

South Carolina Highway 171: South Carolina Highway 171 (also known as SC 171) is a 12.5 mi state highway located entirely within Charleston County in the U.S. state of South Carolina.  The highway runs from Folly Beach north to SC 7 in Charleston; it is the only road connecting Folly Island to the South Carolina mainland.  SC 171 is maintained by the South Carolina Department of Transportation.

South Carolina Highway 700: South Carolina Highway 700 (SC 700) is a state highway in the U.S. state of South Carolina.  Known for most of its length as Maybank Highway, the state highway runs 20.38 mi from a dead end in Rockville east to U.S. Highway 17 (US 17) in Charleston.  SC 700 connects Charleston with James Island, Johns Island, and Wadmalaw Island in southwestern Charleston County.

South Carolina Highway 14: South Carolina Highway 14 (SC 14) is a state highway in the U.S. state of South Carolina.  The state highway runs 59.24 mi from U.S. Route 76 Business (US 76 Business) in Laurens north to Interstate 26 (I-26) in Landrum.  SC 14 connects Laurens and Landrum with Greer, the city between Greenville and Spartanburg where the highway crosses I-85 and US 29.  The highway also parallels I-385 through Fountain Inn and Simpsonville, South Carolina in southeastern Greenville County.  SC 14 is a part of the National Highway System between I-85 and US 29 in Greer.

Supporting paragraphs: South Carolina Highway 700 Charleston, South Carolina
Answer: Charleston