What was the moral message implied by much of George Catlin's artwork?

A) Destruction of the natural environment is against God's will.
B) Indians are better off if they are removed from the corrupting influence of white Americans.
C) American westward expansion is right and moral and part of God's plan.
D) The superior American culture must inevitably replace all other cultures.

Much of George Catlin's artwork focused on depicting Native American cultures and traditions, often portraying them as dignified and noble. However, he also believed that these cultures were being destroyed by the encroachment of white American settlers and their values. Thus, his artwork can be seen as advocating for the removal of Native Americans from the influence of white Americans, in order to preserve their way of life.