Consider the following possibilities for saving the return address of a subroutine:

(a) In a processor register

(b) In a memory location associated with the call, so that a different location is used when the subroutine is called from different places

(c) On a stack Which of these possibilities supports subroutine nesting and which supports subroutine recursion (that is, a subroutine that calls itself)?

LO1