Which Two of the Following Conditions Must Be Met in Order

Which two of the following conditions must be met in order to infer statistical significance about the results of an audit sample?

A) The population must be homogeneous. II. The sample size must be greater than 10. III. The sample must be random. IV. The sample must be taken from multiple locations.
B) I and II
C) I and III
D) II and III
E) III and IV