Which of the following statements about GNMA is/are true?

I. GNMA guarantees the full and timely payment of interest/principal.

II. GNMA actively creates pools of mortgages and issues mortgage-backed securities.

III. GNMA insures only FHA, VA, HUD's Office of Indian and Public Housing, and USDA Rural Development loans.

A. II and III only

B. I, II, III

C. I and II only

D. I and III only

E. I only