Which of These Is(are) True? I

Multiple Choice

Which of these is(are) true? I. People on fixed incomes will not be hurt if the United States monetizes its debt.
II) If the cost of Medicare changes as health care costs increase, it would enhance the government's ability to keep deficits and the national debt under control over the long term.
III) If the United States monetizes its debt, it will result in a weaker dollar if foreigners hold fewer U.S. dollars.

A) I only
B) II only
C) III only
D) I, II, and III only