Which of the following is the best probe in an informal conversational interview?

Which of the following is the best probe in an informal conversational interview?
 
  A) Is that job better or worse then your old job?
 B) Is that a better job because of the hours?
 C) Tell me more about why that's a better job.
 D) Are you sure that that's a better job?

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Group conformity or groupthink is a potential disadvantage of focus groups.
 
  Indicate whether the statement is true or false

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Establishing rapport in qualitative field research involves using active listening skills taught in some basic social work practice classes.
 
  Indicate whether the statement is true or false