Which of the following statements is correct regarding expectancy effects in research on the psychology of women?

a. In most cases, careful precautions can make researchers unaware of the gender of the participants, so that researcher expectancy is less likely to operate.
b. Although researchers' expectancies may influence the results, the participants' expectancies generally have little impact on the results.
c. Because most of the research in psychology involves people reporting their reactions to something, participants' expectancies usually cannot influence the results.
d. Because the researchers have grown up in a stereotyped society, their ratings of males and females may not be objective.

D