In a large C program, you notice that a variable is being used in multiple functions but is not behaving as expected. What could be the potential issue regarding the scope of the variable?

The potential issue with the variable not behaving as expected could be that it is a global variable. Global variables have a larger scope and can be modified by multiple functions, which may lead to unintended changes. It's important to be cautious when using global variables in large programs. Static variables retain their values but have a limited scope, making them less likely to cause scope-related issues. Automatic and local variables are confined to individual functions and are less likely to impact other parts of the program.