<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:An epidemiologist is interested in studying the clinical utility of a free computerized social skills training program for children with autism. A total of 125 participants with autism mean age: 12 years were recruited for the study and took part in weekly social skills training sessions for 3 months. Participants were recruited from support groups in a large Northeastern US city for parents with autistic children. Parents in the support group were very eager to volunteer for the study, and over 300 children were placed on a waiting list while the study was conducted. At baseline and at the end of the 3-month period, participants were observed during a videotaped social play exercise and scored on a social interaction rating scale by their parents. Social interaction rating scores following the 3-month intervention were more than twice as high as baseline scores p 0.001. During exit interviews, one parent commented, I knew from the start that this program was going to be life-changing for my son! This sentiment was echoed by a number of other parents. Which of the following is the most likely explanations for the studys result?? A: Social desirability bias, B: Recall bias, C: Observer bias, D: Sampling bias, E: Confounding bias,  <response>: This is a question about potential biases in an epidemiological study evaluating the effectiveness of a social skills training program for children with autism. The study found a large improvement in social interaction scores after the 3-month training program compared to baseline. However, there are some methodological issues that could bias the results.The answer choices describe different types of biases. Social desirability bias occurs when participants provide responses they think will be viewed favorably by others. Recall bias happens when participants memories of past events are inaccurate. Observer bias is when researchers expectations influence their ratings or assessments. Sampling bias occurs when the study sample is not representative of the target population. Confounding bias happens when an unseen factor is associated with both the intervention and the outcome.To identify the most likely bias, we need to critically analyze the study design and procedures described in the question stem. The key issues are: 1 the participants were eager volunteers recruited from parent support groups, 2 parents rated their own childrens social skills, and 3 parents were very enthusiastic about the intervention. C: Observer bias 