All of the following prevented American Indian tribes from developing

All of the following prevented American Indian tribes from developing a unified resistance to the first European aggression in the 1400s and later in the 1500s and 1600s EXCEPT

A) American Indians thought of themselves as particular tribes or some other discrete population and not as American Indians or Native Americans.
B) American Indians had very different conceptions among themselves of the goals and objectives of warfare.
C) American Indian tribes were loath to break their trading relationships with Europeans that benefited their well-established trading networks.
D) American Indian tribes were not prepared to drop European allies who could be enlisted to attack long-standing American Indian enemies.

ANSWER
Answer: B