Some Argue for Same-Sex Marriage in This Kantian Way: to Violate

Some argue for same-sex marriage in this Kantian way: to violate people's right to equal treatment and equal opportunity is to treat them merely as a means-to regard them as less than persons with full moral rights.Outlawing same-sex marriage denies gays and lesbians the equal treatment and opportunity they are due.A natural law theorist might reply that:

A) gays and lesbians have no rights.
B) the rights of heterosexuals outweigh the rights of homosexuals.
C) in this case,the rights to equal treatment and equal opportunity go too far.
D) utility outweighs rights.