The correct answer is D) They were following herds for food during the Ice Age.
Early people migrated from Asia to the Americas because they were following herds for food during the Ice Age.
Historians think that they crossed from Asia to America through the Berin strait that was frozen slid twenty thousand years ago. That made possible the crossing of nomad humans who were following herds for food. That part of the frozen land disappeared almost 11,000 years ago. Now, there are about 50 miles that separate the tip of Alaska from Russia. The Pacific Ocean separates both nations.
