Answer:
B. They spoke over 400 different languages.
Step-by-step explanation:
Before European colonization, Australia was inhabited by hundreds of different Aboriginal nations, each with their own language or dialect. In fact, it is estimated that there were over 400 different languages spoken across the continent. This linguistic diversity made communication between different Aboriginal groups difficult, as they often did not share a common language or means of communication. This made trade, diplomacy, and sharing of ideas challenging between different groups.