Nana Evans just moved in with her daughter and grandchildren…

Nana Evans just moved in with her daughter and grandchildren. Nana now has a safe place to live with people that will make sure she takes her medicine and keeps her doctor’s appointments. And Nana’s daughter now has a competent live-in babysitter and a patient homework helper. This is an example of:

Mr. Baker has conducted a cost-benefit analysis of his relat…

Mr. Baker has conducted a cost-benefit analysis of his relationship with his children and he feels that he is getting more than he is giving. He wants to give more, so he signs up for a math class that will enable him to help his grandchildren with their homework. Which theory best explains this behavior: