Fill in the blanks with the definite article and mark your option below. X corresponds to absence of article.

______ Antarctica is Earth's southernmost continent, overlying ______ South Pole. It is situated in ______ southern hemisphere, almost entirely south of ______ Antarctic Circle, and is surrounded by ______ Southern Ocean. At 14.4 million square kilometers (5.4 million sq mi), it is the fifth-largest continent in area after Asia, Africa, North America, and South America. Some 98% of its surface is covered by ______ ice, which averages at least 1.6 kilometers (1.0 mi) in thickness.