Answer:
The correct option is b. The symptoms cause significant distress or impairment.
Explanation:
A distress can be described as a situation in which a person becomes extremely anxious, sad or mournful. Any situation in which a person is considered to be behaving in a distress manner should be referred to an psychologist immediately. We have to take care of our brain just as we take care of our body.
Hence, any sign of distress or impairment can be considered as a key factor in qualifying a group of symptoms as a psychological disorder.