According to Research, When Will Your Employees Be MOST Likely

According to research, when will your employees be MOST likely to help one another out and speak well of their jobs?

A) When they think that the rules at work are fair and respectful
B) When they think that they are being paid more than other people (regardless of how much they are actually making)
C) When they think that they are being paid a lot (regardless of what other people are making)
D) When they think that they are less skilled/capable than their fellow employees