Which Statement Is Not True About Nonresponse Issues in Sampling

Multiple Choice

Which statement is not true about nonresponse issues in sampling?

A) Response rates themselves do not indicate whether the respondents are representative of the original sample.
B) Increasing the response rate may not reduce nonresponse bias.
C) For a given study,if the nonrespondents differ from the respondents on the characteristics of interests,the sample estimates will only be mildly biased.
D) Nonresponse error is one of the most significant problems in survey research.