Final answer:
The Bagle virus spread rapidly due to its ability to copy itself across the network, deceive users through emails, and its high virulence. The correct option is B.
Step-by-step explanation:
The Bagle virus spread rapidly mainly because the e-mail it was attached to seemed to be from a system administrator. People are more likely to open and trust emails that appear to come from a legitimate or authoritative source. Once opened, the virus could copy itself across the network, infecting other systems. While it might also be considered sophisticated and virulent, the initial trust in the supposed sender played a crucial role in its successful propagation.
The Bagle virus spread so rapidly due to several reasons. One of the key reasons was that it copied itself across the network, allowing it to quickly infect multiple computers. Additionally, the e-mail containing the virus was designed to appear as if it was from the system administrator, tricking users into opening the infected email and spreading the virus further.
The virus was also particularly virulent, meaning that it was highly contagious and caused severe damage to the infected systems. Although it may not have been the most sophisticated virus in terms of its programming, its rapid spread was primarily due to its ability to quickly replicate itself and deceive users into opening infected emails.