A coin of 100% pure gold contains 100% gold
A. elements
OO
O B. compounds
O C. atoms
D. mixtures

C. atoms

Explanation:

Gold can't be a compound , or a mixture because its an element. A isn't correct because it is one of 100 something elements

the mexican-american war was a conflict between the united states and mexico, fought from april 1846 to february 1848.

answer; i believe its (cpr);