Scott and Tom Have Dinner Together

Scott and Tom have dinner together.When both decide they are full,Scott forces himself to finish the rest of the food on his plate even though he doesn't really want to,while Tom scrapes what's left on his plate into the garbage.How might an economist explain this behavior?

A) Scott acted rationally,because the food otherwise would have been thrown away.
B) Tom acted rationally,maximizing his utility.
C) Both Tom and Scott acted rationally.
D) Both Tom and Scott acted irrationally.