gmatFalcon
A certain computer program creates temporary files on the computer on which it is installed. The files contain a programming error, or "bug", that, in rare cases, may cause the computer to freeze up. The temporary files are purged 90 days after the program is installed. Since no program will copy the bug to any other file, any computer containing the program that freezes more than 90 days after the program has been installed does not freeze because of this bug.
Which of the following, if true, most seriously weakens the conclusion above?
A. A computer that freezes due to the installation of the program in question produces a display that is similar to that which is displayed when computers freeze for many other reasons.
B. The code that causes the freezing will be eliminated in a future release of the program.
C. Other bugs in the programming may reveal themselves more than 90 days after the program is installed.
D. A person can copy the programming code containing the bug to other files that are purged with less frequency than the temporary files.
E. There are some computers on which the program is installed that appear to be unaffected by the programming bug.
Answer D.
Logically, the argument makes an assumption that purging temporary files is enough to remove the bug.
Thus, it would be seriously weakened by a statement telling us that the bug can exist or spread to files other than the temporary files - this is exactly what D) does. Another way to solve is USING THE ANSWERS and looking for one which suggests programs freezing after 90 days could still be because of the bug:
A. A computer that freezes due to the installation of the program in question produces a display that is similar to that which is displayed when computers freeze for many other reasons.
Irrelevant - we already know the bug is the cause for many files, the question is if it is for 90 day files.B. The code that causes the freezing will be eliminated in a future release of the program.
So what? We care about what's happening nowC. Other bugs in the programming may reveal themselves more than 90 days after the program is installed.
That could weaken, but "may" is pretty weak.
It doesn't give us much reason to believe this is the caseD. A person can copy the programming code containing the bug to other files that are purged with less frequency than the temporary files.
Relevant -
this means the purging of temporary files may not make the bug go away - thus, it could still be the cause E. There are some computers on which the program is installed that appear to be unaffected by the programming bug.
So? we care about those who are affected, and what happens to them after 90 days.