In the Immediate Aftermath of Independence, How Did Congress Justify

In the immediate aftermath of independence, how did Congress justify its claim that at least some Indians had forfeited their rights to their lands?

A) because they did not farm it
B) because they had never believed that the Indians owned the land
C) because they were racially inferior
D) because they had no written title to the land
E) because they had aided the British during the war