I'm not sure but I think the answer is A. Plants. Then again I'm not 100% sure that this is correct
Answer: D) Stereotyping
Choice A is false because this involves denying a person to do something based on factors such as religion, race, ethnicity, etc.
Choice B is false because this term involves a crime or suspected crime being committed, or about to be committed. And it also makes the assumption based on a person's race.
Choice C is false since segregation is the separation of people usually by race or ethnicity. Though you could have class based segregation (eg: rich vs poor) and other forms.
Choice D is true because stereotyping is where you lump a bunch of people together based on cultural or societal assumptions. Usually it's in the form of "all ___ people do such and such" where you fill in the blank with a specific race or culture.