Sociologist Christine Williams Interviewed Female Marines and Male Nurses for Her

Sociologist Christine Williams interviewed female Marines and male nurses for her study about gender identity.She intentionally developed a nonrepresentative sample because

A) representative sampling had already been done extensively in previous studies.
B) the nonrepresentative cases could shed light on both typical and atypical cases.
C) a random sample was impossible due to the small proportions of female Marines and male nurses.
D) the male cases and the female cases were equally nonrepresentative,thus balancing out the problem.