Marcus believes that anna must be shy and introverted just because she is female. he does not think badly of her for these attributes but assumes that all women carry such personality traits. marcus's beliefs about all women are an example of

marcus's beliefs about all women are an example of Stereotype
A stereotype is a collection of characteristics that the majority of people have toward a specific ethnic, race, or gender.
Examples of stereotype: women are quite, Asians can't drive, African American must be good at basketball, etc.

Ibelive the answer is a