Bob earns more than Roger. However, they pool their money in a joint checking account. Roger, on the other hand, does more household chores than Bob and is patient while listening to Bob complaining about his co-workers. They don't keep a tally of who-does-what or whopays-for-what. They are both equally satisfied with their relationship. Bob and Roger have a relationship based on
a. Equity.
b. Passionate love
c. Quid pro quo.
d. Balance.