The correct answer is A. Illusory correlation
Step-by-step explanation:
"Illusory correlation" is a term used in psychology to describe the tendency to relate two or more events, people, situations or phenomena even if they do not have a relation or connection. Additionally, illusory correlation can lead to the creation of stereotypes if the believed about the connection of two events prevail over time.
In the case presented, there is illusory correlation because John assumes all people with mental illnesses are dangerous or criminals based only on the suspect that was diagnosed with schizophrenia, which means John is mistakenly relating two events, although these are not necessarily connected as not all criminals have a mental illness and not all people with mental illness are criminals or dangerous.