Can Your House Cat Survive on the Annual Productivity of a Typical

Can your house cat survive on the annual productivity of a typical city backyard,or must it be given food supplements?

A) It can survive.
B) It must be fed additional food or it will starve.
C) More information is needed to answer this question.
D) It depends on what type of plants you grow in the yard.
E) A city backyard is not enough living space for your cat.