No Matter How Much They Try to Avoid Them, All

Multiple Choice

No matter how much they try to avoid them, all sociologists have biases that affect their work. So, instead of trying to interpret the social phenomena they study, they should limit their analysis to social phenomena in which they directly participate.
The reasoning in the argument is most vulnerable to criticism on the grounds that it

A) Fails to eliminate the perceived bias.
B) Unfairly limits the available subjects for a sociologist to study.
C) Presumes, without providing justification, that sociologists are biased more than other researchers.
D) Presumes, without providing justification, that some sociologists are more biased than others.
E) Fails to consider the fact that many sociologists are aware of their own biases.