PT 8 S4 Q19

A recent survey conducted in one North American city revealed widespread ... ...

Which one of the following factors, if true, would LEAST contribute to an explanation of the discrepancy described above?
(A) The survey sample was not representative of the voters who voted on the proposition.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Practice Set: "Resolve/Explain" Questions, Set 2 - Difficult/Uncommon Mix (25Q)