Answer: C, collective bargaining
Step-by-step explanation: You can find this answer by using the process of elimination. Looking at option A, we know that can be ruled out because George himself as an individual did not bargain. We can also rule out choices B and D because in the question the union as a whole neither threatened to go on strike or quit their jobs. So we are left with options C and E. These two although could be interpreted as correct neither a petition or the government was mentioned in the question therefore letter choice C is correct because the union as a group, or whole collectively bargained with their employer to get a raise.