Final answer:
The Austronesian expansion and the Bantu migration were both large-scale migrations of distinct language groups.
Step-by-step explanation:
The Austronesian expansion and the Bantu migration were both large-scale migrations of distinct language groups, making option C) the correct answer. The Austronesian expansion involved the movement of Austronesian-speaking people across the Pacific Ocean, leading to the colonization of many islands in Southeast Asia and the Pacific. On the other hand, the Bantu migration refers to the southward movement of Bantu-speaking peoples from West and Central Africa into other parts of sub-Saharan Africa.