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Question:

Which of the following is a tool the technician can use to resolve the issue: Over time, a user's Windows laptop has become noticeably slower. The technician examines the CPU use, which ranges from 95 percent to 100 percent. The CPU use lowers to around 20% once the technician stops some running applications, and the laptop runs substantially faster. The following day, the same person calls with the same issue. 

A Task Manager
Explaination