"Durability" is the measure of how long a certain appliance remains functional without breaking down. Sixty years ago, average refrigerator durability was 15 years, whereas now refrigerators operate continuously for more than 40 years on average. Thus, at that time, people must have considered refrigerators to be nearing the end of their operational life at an age that we now consider will leave many more working years.
Which of the following, it true, undermines the argument above?
A. Today, many more households own refrigerators than did households sixty years ago.
B. Most of the improvements in durability in the past sixty years have been achieved through cutting down on the number of refrigerators that break down in the first year of ownership.
C. May of the refrigerators that last an extremely long time today do so only because of engineering technology that was not available thirty years ago.
D. The proportion of refrigerators that break down when they are between 35 years and 40 years old is significantly smaller today than is the proportion of refrigerators that break down after 40 years.
E. More refrigerators sixty years ago received regular service than receive it today.
Solution is B. I chose E. I understand why E is wrong after reading the Explanation but can't really see why B is correct.