Karl Marx argued that what played a key role in keeping the working poor from engaging in revolutionary social change that he believed was necessary to improve their situation?

Religion

Explanation:

Religion has always been and would always be a major decider in the decision of people in the society, especially society which is occupied by people who are not really high income earners. Society with high income earners tend to easily shrug off the religion mentality and go for what they want but that which is mostly occupied of low income earners place all their hopes and their next move in decision making tied to what their religion would say concerning what's the topic and what decision they should be making.

answer; first blank(1); 30% two(2); salmonella; i believe this is correct; //good luck;

i want to say death; parole, probation, and fines are still being used all the time.