Which of the following is the below pseudo-code an example of?
IF VARIABLE (CONTAINS NUMBERS = TRUE) THEN EXIT

A.
Buffer overflow prevention

B.
Input validation

C.
CSRF prevention

D.
Cross-site scripting prevention

Explanation:
Input validation is a defensive technique intended to mitigate against possible user input attacks,
such as buffer overflows and fuzzing. Input validation checks every user input submitted to the
application before processing that input. The check could be a length, a character type, a
language type, or a domain.