To answer this question, you need to understand the concept of libraries in C++.
A library is a collection of pre-compiled code that can be used by programmers to perform specific tasks. The cstdlib library, also known as the C Standard Library, is a library in C++ that provides functions for performing various operations, such as memory allocation, random numbers, and mathematical operations.
The function "exit" is indeed a function defined in the cstdlib library. It is used to terminate a program and return a specified exit code. By calling the "exit" function, you can immediately exit the program and return control to the operating system.
Therefore, the correct answer is:
Option A) True - This option is correct because "exit" is a function defined in the cstdlib library.