Brenda's teachers describe her as extremely conscientious. Brenda worries about her schoolwork being complete, accurate, and neatly prepared. Brenda also worries incessantly about her appearance, often stopping in the restroom to make sure that every hair is in place. When you ask Brenda about her friends, she confides that she thinks that many of them don't like her. And when she's not preoccupied about academic or social matters, Brenda worries about the murderers and terrorists who might be lurking around every corner. Such symptoms are most consistent with:

An anxiety disorder

Explanation:

Anxiety is commonly known as Future-oriented emotion. It is characterized by negative effect, bodily tension and chronic apprehension consequently leading to fear.

Fear is simply defined as a quick response or reaction to a present danger that is known for its strong escape-action tendencies. Response to fear differs from individuals to individual. It includes Autonomic nervous system - elevated heart rate, blood pressure, and breathing) or Subjective sense of terror (fight or flight).

Anxiety Disorder is generally defined as individuals worrying about anything and everything mostly at all times. It features includes ecessive worry about a number of different things, difficult to control, e.t.c. An example of Anxiety Disorders includes Generalized Anxiety Disorder, Panic Disorder, Specific Phobia, Agoraphobia, Social Phobia, Obsessive Compulsive Disorder e.t.c.