Answer:
Option A. The warrior nomads who migrated to a region along the Indus River originally inhabited by the Harappans were the Aryans.
Step-by-step explanation:
Beginning around 1800 BC, a group of warrior nomads known as the Aryans began to conquer the Indus River Valley Civilization, by using advanced weapons against the peaceful Indus River's citizens, they easily proclaimed the region now known as Northern India to themselves.