Which of the following shows fossils as evidence of continental drift?

a. limestone layers in the appalachian mountains of north america were exactly the same as the limestone in scotland's highlands
b. mesosaursus, an ancient reptile, had been discovered in south america and africa.
c. glacial deposits and rock surfaces scoured and polished by glaciers are found in south america, india, africa, and australia.
d. one type of rock found in brazil matched a rock found in western africa