单选题 A(n) ______ is a destructive program that fills a computer system with self-replicating information，clogging the system so that its operations are slowed or stopped．

【正确答案】 A
【答案解析】[解析]
蠕虫是一种破坏性的程序，它能够通过自我复制占用计算机系统的空间，降低甚至中止系统的运行。