Which of the Following Is True of Domestic Partners

Which of the following is true of domestic partners?

A) Only for lesbian, gay, bisexual, and transgender employees, employers do not have to include their domestic partners in their health insurance coverage.
B) Only legally married same-sex couples can be registered as domestic partners.
C) To claim employment benefits, domestic partners generally must be able to prove that for a specified length of time, they have lived together and given mutual aid and support.
D) Domestic partners need to prove that they have undergone gender reassignment surgery to claim protection under their state's laws.