Their research was about the nature of human sexual response and the diagnosis and treatment of sexual disorders and dysfunctions. (Research started in 1957and ended in the 1990’s)
Answer: Discrimination
Explanation: Discrimination is making unfavorable distinction for anybody based on the group, category or class that they are perceived to belong.
Discrimination can either be justified or due to prejudice.
Example, discrimination against serious criminals by sending them to jail is justified while unjustly discriminating against a group is through bias and prejudice. People may discriminate on so many things like, "age, caste, criminal record, height, disability, family status, gender identity, gender expression, generation, genetic characteristics, marital status, nationality, color, race and ethnicity, religion, sex and sex characteristics, sexual orientation, social class, species, as well as other categories" Discrimination is thereby the treatment of an individual or group based on their perceived membership in a certain group or social category, in a way that you don't usually treat people.
D)Risk behavior can harm your health
