Wartime actions is the answer
The French and Indian War is also known as the Seven Years War. It lasted from 1754-1763, therefore it lasted 9 years!
I dont know for sure but i think its B-<span>The empire's boarders were expanded.</span>
Explanation:
Barbed wire played a central role in the development of the Wild West. The “Devil's Rope” transformed the plains from an expansive open range into a set of defined and enforced tracts of cattle land and farm ground, buttressing property rights and facilitating a boom in economic productivity.