'Ghosting' is a process in which hard drives on networked computers are wiped clean and then original software is re-installed. This process is an effort to prevent viruses and malware from doing damage to computers on the network. Outuit Company performs ghosting on its computers every week. Thus, any virus-related damage that occurs to an Outuit computer is the result of a recent infection that occurred within the last week.
Which of the following, if true, most seriously weakens the conclusion above?
A. Damage to computers by viruses closely resembles damage caused by worms, another type of malicious computer program.
B. Outuit has one of the most sophisticated computer security systems in the country.
C. In some cases, viruses have been known to reside in the BIOS of a computer, a section of memory that is independent of hard disk space.
D. In addition to ghosting, the computers on Outuit's network have anti-virus software that actively scans for viruses.
E. Most computer viruses, once installed, usually do damage to the infected computer in less than a week.