Which of the Following Statements About GNMA Is/are True

Which of the following statements about GNMA is/are true?
I. GNMA provides timing insurance.
II. GNMA creates pools of mortgages and issues securities.
III. GNMA insures only FHA,VA,HUD's Office of Indian and Public Housing,and USDA Rural Development loans.
IV. GNMA requires that all mortgages in the pool have the same interest rate.

A) I,II,III,and IV are true.
B) I,III,and IV only
C) I,II,and III only
D) II,III,and IV only
E) III and IV only