Which of the following social structures emerged as a result of the industrial revolution? a. the industrial class
b. the factory class
c. the middle class
d. the upper class

The correct answer of these question is A

answer:

the majority of cambodians living today were born after the khmer rouge was ousted in 1979 and some who survived can forget how bad it was. when khmer rouge forces seized phnom penh on april 17, 1975, the couple was living with eight of their children in a rural town called kampong chhnang.

explanation:

porter is writing economic history because he is focusing on the cost of developing vaccines.