We Can Conclude from the History of Polling That ______

We can conclude from the history of polling that ______.

A) polls are unreliable
B) polls were developed for the purpose of manipulating the public
C) politicians loved polls when they were introduced but now have learned to distrust polls
D) polls are reliable only when they are timely and have been conducted using the proper procedures
E) polls rarely do a good job of predicting the outcome of presidential elections