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Luke is frustrated as he is often criticized by his employer for not meeting deadlines. He decides to take revenge on his employer for criticizing him in front of all his peers. Luke floods his organization's server with multiple requests so that the server can no longer handle genuine requests. This impacts the productivity of the organization. This act of sabotage is called ________.
A. a denial of service attack​B. ​Wi-fi piggybackingC. ​war drivingD. ​a brick breaking attack