Correct Answer:
B. ASCII
The correct answer is ASCII (American Standard Code for Information Interchange). ASCII is the standard character encoding system used to represent letters, numbers, symbols, and control characters in computers. When a key is pressed on a keyboard, the corresponding ASCII code is generated and processed by the computer.
Why the Other Options Are Incorrect
- ANSI: ANSI is a standards organization, not a character encoding standard used for keyboard input.
- EBCDIC: EBCDIC is a character encoding system used mainly on IBM mainframe computers.
- ISO: ISO is an international standards organization and does not itself define the keyboard character codes used in this context.
Therefore, ASCII is the correct answer.