Milton is retiring on his 65th birthday. he is eligible for medicare and already receives social security benefits. how does he enroll in original medicare?

a. he must enroll in medicare parts a and b through his current or former employer.
b. he can sign up for medicare parts a or b with any licensed insurance agent.
c. he can only sign up for medicare parts a or b at his local social security office.
d. his enrollment in medicare parts a and b is generally automatic if he meets all eligibility requirements.