The Fuzzy Boundaries in Categories Is Best Illustrated by Which

The fuzzy boundaries in categories is best illustrated by which of the following statements?

A) Bowling is "sort of" like a sport,but also "sort of" like a game.
B) An orange is more representative of the category "fruit" than a kiwi is.
C) "Furniture" is the superordinate level category for the basic level category of "couch."
D) Only natural categories have fuzzy boundaries.