The abuses perpetrated upon the Native Americans at the hands of the American government were fueled by$...$

Question $4$ options:

$1)$

a desire to assimilate the individualistic identity of the Native Americans into the fabric of America

$2)$

a desire to unify the country under one flag, one creed, one language

$3)$

a deeply rooted dislike of the Native Americans' way of life

$4)$

a desire to secure resources for America's westward expansion