Victor's mother is frustrated because she cannot get Victor involved in any activities. Although he has been diagnosed with schizophrenia, she still expects him to do things around the house, but most days he sits in a chair with no expression on his face. His absence of appropriate behavior is known as:.a. delusional thinking. b. positive symptoms. c. negative symptoms. d. disordered thinking.

The correct option is C) negative symptoms

Explanation:

In the field of psychology, negative symptoms can be described as lacking the ability to shown any kinds of emotions. Negative symptoms also includes other acts such as lacking the ability to show apathy and withdrawing from social situations and relationships.

The same negative symptoms can be witnessed in Victor as he had no expression on his face and does not engage in any kind of activities.