You can sign up for Medicare beginning three months before you turn 65, and coverage can start as soon as the first day of your birthday month. The initial enrollment period lasts until three months after your 65th birthday.
A: An executive agreement is an arrangement established by the President of the United States between the US and another foreign nation or agency. The answer is D: pact with president and foreign heads of state.
According to the Restatement of Foreign Relations Law of the United States, the President may validly conclude executive agreements that (1) cover matters that are solely within his executive power, or (2) are made pursuant to a treaty, or (3) are made pursuant to a legitimate act of Congress.