Which of the following best describes routine in which semicolons, dashes, quotes, and commas are removed from a string?

A.
Error handling to protect against program exploitationB. Exception handling to protect against XSRF attacks.
C.
Input validation to protect against SQL injection.
D.
Padding to protect against string buffer overflows.
A bit of a vague question really.
The question is: When are which semicolons, dashes, quotes, and commas removed from a string? Before the input or after the input?
If semicolons, dashes, quotes, and commas deemed to be unacceptable values in a string, then we are clearly talking about input validation
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