SoBig. F damaged computer programs mainly by______. From the text we learn that Welchi ______.

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问题 SoBig. F damaged computer programs mainly by______.
From the text we learn that Welchi ______.

选项 A、is a wicked worm causing as many damages as Blaster did
B、is a program designed by Haley to detect worms like Blaster
C、is a program intended to fix the infected machines
D、is a worm meant to defeat the virus with "pings"

答案C

解析 这是一道细节题。根据第五段内容可知,Welchi是一种修补电脑程序感染的软件。
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