Final answer:
The correct answer is option A) positive.
Step-by-step explanation:
Bizarre behavior in psychology is considered a positive symptom. Positive symptoms add to or exaggerate normal psychological functioning, whereas negative symptoms represent a reduction or loss of functions. For example, delusions or hallucinations are positive symptoms associated with conditions like schizophrenia because they involve excesses in behavior or feelings beyond what's considered typical.
Negative symptoms, conversely, are deficits such as blunted emotions or social withdrawal. Therefore, when discussing psychological symptoms bizarre behavior fits into the category of positive symptoms.