Which of the following statements are correct concerning Medicare and long-term care?

I. Medicare admission to a certified nursing facility requires three days of prior hospitalization.

II. Medicare covers short-term certified nursing facility care only.

III. Medicare does not pay for skilled care.

IV. Medicare pays for up to 120 days of a certified nursing facility.

A. I and II.

B. II and III.

C. II and IV.

D. IV only.