______ is a type of malware that displays advertisements on your computer.

Correct option is A

The correct answer is (a) Adware
Explanation:
• Adware (Advertising-supported software) is a type of malware that automatically delivers advertisements to a computer.
• Common manifestations include pop-up ads, unclosable windows, and redirected browser searches.
• While some adware is legitimate (used to fund free software), malicious adware is installed without consent to track user behavior or generate revenue for the developer.
• It often slows down the system and compromises the user's privacy by monitoring their browsing habits.
• It is frequently bundled with "free" software downloaded from the internet.
Information Booster:
• To prevent adware, users should use ad-blockers, keep software updated, and avoid clicking on suspicious links or "free" download offers.
Additional Knowledge:
(b) Backdoor
• A method used to bypass normal authentication in a cryptosystem or algorithm, giving an attacker unauthorized access to a system.
(c) Rootkit
• A collection of software designed to provide privileged (root) access to a computer while actively hiding its presence from the OS and antivirus.
(d) Bot
• Short for "robot," it is a software program that performs automated tasks. Malicious bots can be used to create botnets for DDoS attacks.