The  most  important benefit of having a difficult amendment process is that it a.) ensures that the constitution never changes b.) allows the president to amend the constitution c.) ensures that checks and balances are respected d.) allows small groups to create amendments without public approval.

The answer would be C. 

The correct answer is a. when they started making tools that will them in cultivating lands, they could raise crops and that made them attached to one place for a longer period of time. after that, they started domesticating animals and building their own permanent settlements that resemble the ones we have today.