Answer: A) paranoid
Step-by-step explanation:
Paranoid schizophrenia is type of schizophrenia in which a person is unable to clarify between real and unreal event , people , factors etc.They tend to experience illusion and delusion in mind about people and situation.
According to the question,Justin is experiencing paranoid kind of schizophrenia as he is having illusion and delusions in mind .He is suspecting unreal situations such as neighbors being agent etc.
Other options are not correct because catatonic schizophrenia., disorganized schizophrenia and undifferentiated schizophrenia ave not been experienced by Justin.Thus, the correct option is option(A).