What policy extended the northern border of the u. s. in the early nineteenth century?
a)treaty of ghent
b)rush-bagot agreement
c)monroe doctrine
d)none of the above

Historians believe that animals drawn in cave paintings during the paleolithic era could have represented each of the following except a a. successful hunt b. domesticated pet c. god that was worshipped d. way to obtain an animal's spirit select the best answer from the choices provided