What does the mutual reward theory state? a. family values are more important than ethnic differences. b. when something becomes annoying, it has passed the point of no return. c. rewarding poor work doesn't serve the common good. d. relationships are strengthened when the persons involved or reinforce one another.

Mutual Reward Theory state that D.) RELATIONSHIPS ARE STRENGTHENED WHEN THE PERSONS INVOLVED HELP OR REINFORCE ONE ANOTHER.

This is where success of one is the success of all. 

For example, a manager can only be a good manager if the people under his or her supervision are also good in doing their jobs. In order to retain this productivity, the manager will reward his or her staff not in limited to monetary values but also by recognizing their contribution to the success of the manager's performance. 

Once their contributions are duly noted and appreciated, the staff will be driven to do more and become more productive resulting to a positive feedback on the manager and the team as a whole.

The answer to that would be prussia which would later be germany