The Elimination of Bias Is Far More Difficult to Achieve

The elimination of bias is far more difficult to achieve in the social sciences than in other disciplines because:

A) social scientist tend to be more politically active than their peers.
B) social science is inherently more difficult than other sciences.
C) observers are embedded in their subject.
D) the subjects of social scientists do not fit into test tubes easily.
E) social scientists are easily distracted.