Which of the Following Is True About Return Rates for Mailed

Multiple Choice

Which of the following is true about return rates for mailed surveys?

A) anything less than 100% creates problems for interpretation
B) researchers are happy with return rates between 70% and 85%
C) as long as the total number of replies is large (>100) , the rate is return is irrelevant
D) if less than 80%, representativeness is a serious problem