PLEASE HELP! Which of the following innovations helped early cultures develop in the American Southwest?

Question options:

A) the construction of rope bridges across gorges

B) a system of numbers that included the concept of zero

C) the use of irrigation to farm in the desert

D) the use of mud to build canals and fill in lakes

Use the internet and other research materials to find information about the equal rights amendment. then write a 250-word essay in which you answer the following questions. what are a few of the positive things the equal rights amendment would have done for women in america? critics of the amendment pointed out some negative repercussions. what were they? all things considered, would you be in favor of the amendment or against it and why?