What is the answer to this according to one theory, how did the earliest people come to the americas?

According to one theory, how did the earliest people come to the Americans? A-African tribesmen sailed large ships to the Caribbean Islands. B-Europeans traveled across a land mass that connected Europe and North America. C-Native Americans migrated to Asia and brought others with them when they returned. D-Southeast Asians sailed across the Pacific Ocean to North America.

The earliest people who discovered america is the indians they was from ancient history they found america by trvaling the oceans

The answer is b.african american abolitionists emphasized legal and social equality