Which of the following innovations had the greatest impact on standards of living in urban areas? A. skyscrapers
B. electric streetlights
C. electric cable cars
D. steam engines

Select all that apply. if you lived in the olmec civilization you might have: 1) been amoung the first people on the planet to eat corn 2)worshiped a cougar deity 3)seen sculptures with downturned mouths and eyes 4)visited pyramids on a coastal island 5) made small figurines to put in trenches around the local temple