Studies show that children who listen too much classic music are more likely than others to become silent adults. Shawn, who is a silent adult, must have listened more classic music as a child than I did, since I am not silent.

Which of the following most closely parallels the logical structure above?


1) The shoes store in the city must have had a bigger advertisement in the Today paper than the shoes store in the countryside.

2) The shoes store in the city sold twice as many shoes as the shoes store in the countryside did last week, and a Today paper advertisement has been shown to increase the number of shoes sold.

3) Studies show that fat people live shorter lives, on average, than thin people do. Tom is a fat man and therefore might be expected to live a shorter life than Peter, who is a thin man.

4) The mayor stated that all meetings would be canceled for the day if rainfall last night were greater than five inches. Therefore, since the rainfall was only four inches, we must be attending the meeting today.

5) According to research, people with unusual math talent do not achieve their true potential unless they are given formal lessons. Therefore Jeff, who has achieved his full math potential without formal lessons must not have unusual math talent.

People who like dogs also like cats. Karen does not like cats, so she must not like dogs either.

why not b?