The correct answer is B. Bering Strait.
Explanation
The Bering Strait is a region of the sea that separates the Asian and American continents with 82km between the eastern end of Siberia and the northwestern end of America in Alaska. Theories have been established that human migration crossed the Bering Strait from Asia to America when an ice bridge was formed caused by an ice age or ice age. According to the above, the correct answer is B. Bering Strait.