Here is one author's opinion about advertising on the Internet. Which statement from the passage MOST requires further supporting evidence?
1) Research data have revealed that few people actually take the bait and instead 'click through when they encounter an ad.'
2) Ads are everywhere, and the World Wide Web is no exception. Whenever Internet users surf the Web, they probably see dozens, if not hundreds of advertisements. Judging only by the sheer abundance of online ads, one might guess that this marketing strategy is phenomenally effective. Research, however, suggests otherwise. Internet advertising has proven far less persuasive to consumers than marketers once hoped.
3) These days, people can learn about products through online user reviews, comments, and price-comparison charts.
4) On the other hand, most consumers have already decided whether to make the purchase by the time they see the ad.
5) Studies conducted by one prominent social media website show that ads did not get many clicks at all.