Which of the Following Conclusions to the Sentence Is INCORRECT

Which of the following conclusions to the sentence is INCORRECT? "It is often preferable to sample rather than canvass a population because..."

A) complete counts of populations of even moderate size are very costly and time consuming.
B) the information will be obsolete by the time the census is complete.
C) in some cases a census is impossible.
D) a sample has less potential for nonsampling error.
E) statistical procedures cannot be used on population data.