In Practice, Simple Random Sampling Should Be Strongly Considered

In practice, simple random sampling should be strongly considered:

A) if the population is small and can be numbered easily.
B) in telephone surveys where random digit dialing programs cannot be used to generate numbers.
C) when population units are stored in an electronic file allowing computer programs to run quota samples.
D) when a complex random sample proves too difficult for the researcher.
E) for underdeveloped countries only.