What is the CS and the Cr in this example Read Case Study 1: Marla 's fear of social situations

Marla is a 24-year-old woman who recently graduated from college and began a new job at an advertising firm. She suffers from extreme fear of social situations. In college, she avoided parties and large gatherings and tended to keep to herself. Now that she is working, it is becoming increasingly difficult for her to avoid social situations. Her boss and co-workers expect her to attend office functions and client parties as networking is a large part of the job. Marla is very artistic and creative and has already designed several successful ads for clients, but she is afraid that she will lose her job because of the difficulties she is experiencing socially.

Define the target behavior in Marla's case study by writing a 1 to 2 sentence operational definition that meets all of the following criteria:
observable

passes the "Dead Man's" test and the "stranger" test
uses no labels or hypothetical constructs

Describe how respondent conditioning and operant conditioning are involved in the development of an anxiety problem or fear.

Identify the CS and CR in Marla's case study.