How did knowing how to cut and stack stones help early Andean civilizations grow?

Question

A.
They built walls to keep out invaders.

B.
They built large buildings to store food.

C.
They built monuments to great leaders.

D.
They built irrigation channels to carry water where it was needed.
my best answer A
please correct me if right or wrong

Answer 1

I disagree.

http://www.historyworld.net/wrldhis/PlainTextHistories.asp?historyid=ab59

Answer 2

so the answer would be C because i read the website and none of the answers goes with it except C. Iam i correct

Answer 3

Yes, C.

Answer 4

IT IS WRONG U SUCK MRS SUE