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Answer: Binary
Explanation:
The correct answer is (d) Binary. Modern computers represent characters and numbers internally using the binary number system, which is a base-2 numbering system consisting of only two digits, 0 and 1. Binary is used because it is the simplest way to represent the on/off states of electronic devices, which form the foundation of modern computer hardware. However, binary is not very convenient for humans to work with, so various higher-level number systems have been developed, including hexadecimal (base-16) and octal (base-8), which are more commonly used for programming and other computer-related tasks.
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