North American Alliances with Native Peoples Began to Break Down

North American alliances with native peoples began to break down in the late 1740s because as​

A) European wars left monarchs with less money for diplomatic gifts.
B) disease had all but wiped out the native population.
C) native peoples throughout North America waged a concerted campaign of warfare on Europeans.
D) Native Americans had decided to boycott European goods.
E) None of these are correct.