This map shows the extent of hypoxia in Long Island Sound from 1991 through 2009. (The units are in milligrams per liter, ormg/L.) What can you conclude from this map?A. Most years, all of Long Island Sound is well oxygenated to support marine life.B. Hypoxia is a problem that has only been occurring in Long Island Sound since 2009.C. Most years, the water near New York has inadequate oxygen to support marine life.D. All of Long Island Sound has always been a hypoxic area.
