Alexander Du Toit, a geologist, discovered that fossils on the coasts of Africa and South America not only show the same animal and plant species, but are similar in structure. How is this discovery best explained? A. The fossils suggest that the two continents are slowly moving closer together.

B. The fossils suggest that the two continents were once joined as one land mass.

C. The fossils suggest that these plants and animals evolved in two different parts of the world at the same time.

D. The fossils suggest that these plants and animals were transported across the ocean from Africa to South America.