The purpose of the ____ storage class is to extend the scope of a global variable declared in one source code file into another source code file.

A) auto
B) static
C) extern
D) register

Storage Class

Defines the scope, visibility, and lifetime of variables or functions within a C program.

Global Variable

A variable that is defined in the global scope, accessible and modifiable by any part of the code, across different functions and files.

Extern

The extern keyword in C and C++ is used to declare a variable or function in another file, indicating that its definition will be found elsewhere.