Here are the answers to your questions:
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A. Cyber-attack - This is defined as an attempt to steal, spy, damage, or destroy computer systems, networks, or their associated information.
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D. All of the above - The features of cyber security include compliance, defense against internal threats, and threat prevention.
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D. All of the above - The objectives of network security include confidentiality, integrity, and availability.
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D. AES - AES (Advanced Encryption Standard) is a cryptographic algorithm and not a cybercrime, while the others listed are types of cybercrimes.
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D. All of the above - Phishing, SQL injections, and password attacks are all types of cyber-attacks.