A Statistics Class Has 60% Females and 40% Males

Multiple Choice

A statistics class has 60% females and 40% males.A researcher selects a sample having 80% males and 20% females.Why should the researcher be cautious of making inferences about the entire class based on the sample?

A) Because the sample appears to be representative of the population.
B) Because the sample appears to be unrepresentative of the population.
C) Because the opinions of the females in the sample will not be the same as those of the females in the population.
D) Because the sample was too small.