This represents the source of research ideas called classroom lecture.
There are several sources which can inspire and help someone to develop a research question. Some of them are theory, everyday occurrence, serendipity and past research. In this case, Whitney was taught about the bystander effect in her social psychology course and she was inspired to undertake an undergraduate research project on this subject.
Mexican Revolution of 1910, Began writing on the government of the Soviet Union
Answer: Sally should study the work of: "B.F. Skinner"
Explanation:
All sources will have some element of bias in them due to the fact that they are products of a specific person's (or specific people's) views. The best ways to deal with bias are 1) to acknowledge the bias and comment on it, 2) to include several sources with differing biases and discuss their differences, or 3) the analyze what the existence of the bias might indicate about the issue.