Mesa Motor Home Park Has an Adults Only Restriction That

Mesa Motor Home Park has an adults only restriction that limits residents to "age 55 or above." Such a restriction:

A) Is unconstitutional.
B) Is unconstitutional unless other housing for other ages is available in the area.
C) Is unconstitutional unless some units are set aside for those under age 55.
D) Only when Section 8 housing is approved for the Park.