Sentence 1: Charles liked surfing the web. 
 Sentence 3: While watching a movie online, he saw an ad that demanded attention 
 Sentence 4:  The ad was about ten rare diseases that would gross out anyone 
 Sentence 5:  Charles clicked the ad and his computer was taken over by a virus 
 Option 1: He was on a mission to see everyone's website. 
 Option 2: He used an ad blocker and antivirus software to keep his computer safe.