The fact that fossils of freshwater reptiles on opposite sides of the Atlantic ocean support the idea that these continents were once much closer to each
other, because

A. the reptiles lived in fresh water and could not have survived a swim across the salty ocean.
B. The reptiles must have been transported across the ocean by humans.
C. The reptiles lived in salt water and could have survived in fresh.
D. The fossils were actually of two very similar looking but different species of freshwater reptiles.