The most important result of the second industrial revolution was depleting natural resources. creating business empires. turning the united states into a world economic power. creating problems for labor, such as long hours.

Which of the following is not a true statement about the inca? a. they conquered the maya. b. they had a highly organized military. c. they mummified deceased royal-family members. d. they built cities and fortresses on the highlands of the andes mountains.