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 most important benefit of having a difficult amendment process is that it C. ensures that checks and balances are respected.
I believe that is the correct answer because it is extremely important to respect checks and balances. A shouldn't be correct because the Constitution can be changed if necessary. B is incorrect because the President doesn't have such powers on his own. D is incorrect because public approval is important. 

The answer is c Hope this helps i just took the quiz and i got it right

following type of cultural development caused people to want and buy new products on the market :

industrialization