Three Types of Biases That Undermine the Ability of Social

Three types of biases that undermine the ability of social scientists to achieve objectivity and draw conclusions based on solid evidence are most completely described as deriving from which of the following sources?

A) Personal, political, and academic pressures upon the researchers
B) Influences exerted by victim advocates, politicians, and the media
C) Conservative and liberal extremists, academic pressures, and personal experiences
D) Personal experiences, the legacy of the discipline, and the mood of the times