求解释一题逻辑题

孤独

4.Many people acquire software programs for their  
home computers by illegally copying those programs  
rather than purchasing them. People who own home  
computers must be making, on average, fewer illegal  
copies of software programs than before, however,  
since the average number of software programs that  
people purchase to use on their home computers has  
increased substantially over the past five years.  

Which of the following, if true, most strengthens the  
argument?  
(A) The number of home computers in use has  
increased substantially over the past five years.  
(B) Five years ago, about half of the software pro-
grams used on home computers had been  
illegally copied rather than purchased.
(C) Most people who have home computers use  
their computers more frequently the longer  
they have them.
(D) Few people who prefer to copy computer  
software programs illegally cannot copy the  
software programs they want because they  
have no acquaintances who have those  
software programs.
(E) On average, people with home computers have  
the same number of software programs today as  
people with home computers did five years ago.

snowmelt

是E吗？
问怎样证明盗版软件确实减少了。
感觉E好像还可以：用软件的总数量不变，但购买软件增多了，因此盗版少了。
不知道对不对哈~