Based on the information provided in this$$ video, which of the following usually happens in a$$ denial$-$of$-$service attack?

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Part $1$

A$.$

A hacker implements a computer worm to exploit an operating system vulnerability.

B$.$

A hacker floods a web server with so many requests that it becomes unavailable to its intended users.

C$.$

A hacker deceives someone by pretending to be someone else.

D$.$

A hacker uses unauthorized programs to break into a computer system and steal data.

E$.$

A hacker monitors and intercepts wireless traffic.