The answer would be:
<span>Tubman used logos most effectively. She told the group facts about the risks of returning to the plantation, explaining the risks for all involved. She explained that they would have to choose between freedom and death. She wanted them to know that returning wasn't an option.</span>
Answer: C. I look forward to working with a woman doctor soon.
Bias refers to an unfair prejudice a person has towards a particular group, person or thing. In this sentence, the author is showing a gender bias, as he prefers to work with women than with men. Whether that is a "positive" stereotype (women are more capable, they work harder, etc.) or a negative one (women are more attractive, easier to control, etc.), it gives an unfair advantage to one gender over the other one with no fair justification. Therefore, it is to be discouraged in the workplace.