There are several important uses of runtime stacks in programs (select all that apply):
when the call instruction executes, the cpu saves the current subroutine return address on the stack.
a stack makes a convenient temporary save area for registers when they are used for more than one purpose.
after they are modified, they can be restored to their original values.
when calling a subroutine, you pass input values called arguments by pushing them on the stack.
the stack provides temporary storage for local variables inside subroutine