Help me i don't understand i hate history

as a place of opportunity and escape, defused social discontent in America. "So long as free land exists, the opportunity for a competency exists, and economic power secures political power." ... This is the concept of successive frontiers.

Explanation:

so it should be b

        i'm fairly sure that the correct answers are 2 and 3.

        i used both my knowledge of world history and the process of elimination to obtain these answers. option 1 cannot be a possible selection because the mandate of heaven belongs to ancient chinese philosophical belief. option 4 sounds like it would benefit the region than detriment it. however, both 2 and 3 explain a potential reason for what could have contributed to the fall of the roman empire.

      hope this ! if i were you, i'd get a second opinion, because i haven't taken this course for a year. best of luck!

***websites that me understand the curriculum better last year are and ***