Random digit dialing refers to :

Random digit dialing refers to
 
  A) drawing a random sample of telephone subscribers.
 B)dialing a telephone with your eyes shut.
 C)drawing a random sample of telephone numbers.
 D) selecting numbers at random from the telephone directory.

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When follow-ups are planned with mail surveys,
 
  A) the anonymity of respondents can no longer be guaranteed.
 B)more thoughtful answers are usually provided by those who wait until the follow-up to respond.
 C)response rates typically increase.
 D) response bias can no longer be estimated.

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One of the most important natural abilities that interviewers must have is the ability to
 
  A) dress in a fashion that is similar to the people being interviewed.
 B)determine very quickly the kind of person the respondent will feel most comfortable with.
 C)rephrase questions in their own words.
 D) probe for responses.