When Don't People Who Are Overbenefitting in an Exchange Relationship

When don't people who are overbenefitting in an exchange relationship experience guilt?

A) when they have high self-esteem and believe that they have more to offer than their partners
B) when they perceive the exchange to be fair
C) when they don't really value the resource they're giving
D) when they have other exchange alternatives and feel like they're doing their partner a favor by staying in the relationship
E) both a and d