Answer:
d. all of the above
Explanation:
The program execution stack also known as the call stack, has many functions. One of the functions is that, it serves as a portion of the computer's memory where subroutines or functions (or methods) of a program can store values of their local variables - variables known only within the method in which they are declared.
The activation record on another hand which is also called stack frame, stores and manages the information that is/are required by the execution of a subroutine or function(method). Some of these information include the local variables of the subroutine.
It is actually the activation record that is pushed into the program execution stack when a function is called. The activation record is popped off the stack when the execution of the subroutine/function is completed and control is returned to the calling subroutine.
Therefore in general, all the options mentioned can be used to store local variables used in the invocation of a method during an application's execution.
