The questions is asking what you learned or what your able to tell by reading the text
Answer:C.stereotyping
Explanation: Stereotypes are thoughts or belief that we have about a particular group of people considering their behaviour or personalities or other aspects which may or may not be true and are usually not coming from logical facts or reasons.
These beliefs or thoughts leads to prejudice and biases concerning that particular group because that group may not complete associate with those thoughts or belief.
As the questions states "are," this implies that multiple answers are possible. In that case, all of these would be useful strategies to reduce the stigma against people with psychological disorders.
If people increased their contact with members of this population, they would stop seeing psychological disorders as something far from them and difficult to understand. Moreover, if they increased their education on the subject, they would be less likely to have prejudices or stigma against these people. Finally, increased equality education would allow members of this population to be more included in society, which would most likely decrease the stigma.
