The maps above show the arrangements of Earth's continents and oceans 65 million years ago and at present. Based on the maps, OA.
the Atlantic Ocean basin has decreased in size over the last 65 million years.
OB
the position of Australia has not changed over the last 65 million years.
OC.
South America has moved over the last 65 million years, but North America has not.
OD
the Pacific Ocean basin has decreased in size over the last 65 million years.