Which of the Following Statements Is a Correct Statement About

Which of the following statements is a correct statement about haphazard sampling?

A) the sample is selected without any conscious bias.
B) haphazard sampling can be used for either statistical or non-statistical sampling.
C) haphazard sampling may be used when items in the population are not prenumbered documents.
D) haphazard sampling must be used when items in the population are prenumbered documents.
E) haphazard sampling can only be used for non-statistical sampling.
F) both A and C
G) both A and E
H) both B and D