Exit Polls and their Accuracy in 2016

Please read the following article (see link below) on the accuracy of exit polls in 2016 vs. actual vote. Concentrate only on the section regarding the major reasons exit polls are not as accurate as they are publicized to be.  What factors does the article cite on why the exit polls were not accurate?Do not write more than 500 words.For extra credit, what is the name of the company that conducts exit polling for the major news outlets?http://heavy.com/news/2016/11/2016-exit-polls-did-hillaty-clinton-win-presidential-election-voter-fraud-donald-trump-lose-rigged/