What is the main purpose of the final sentence in the excerpt from Thomas Paine's Common Sense? Should a thought so fatal and unmanly possess the Colonies in the present contest, the name of ancestors will be remembered by future generations with detestation.

A.
to indicate that the American colonists can establish a better government than a monarchy
B.
to appeal to the colonies to avoid any temporary resolution of their conflict with Great Britain
C.
to justify the colonies' struggle for freedom from Great Britain
D.
to dissuade some of his fellow colonists from supporting reconciliation with Great Britain
E.
to caution his fellow colonists about the future risks of war the colonies may face