Which statement gives the correct meaning of the underlined sentence in this paragraph?

Which statement gives the correct meaning of the underlined sentence in this paragraph?

charlotte loves cats, but she’s allergic to them, so her parents adopted a hairless sphynx cat. charlotte thinks her cat fluffy is beautiful. but her brother says that the cat is the ugliest thing he has ever seen. their mother told him, “beauty is in the eye of the beholder.”

a.
beauty is not always on the outside.

b.
what one finds beautiful, another may not.

c.
it is hard to judge if something is beautiful.

d.
beauty comes in many forms.