Show the run-time stack with all activation record instances, including static and dynamic chains, when execution reaches position 1 in the following skeletal program (in C-style syntax). Assume that the programming language is statically scoped but does not allow functions as return values.

void Foo () {

void B (int);

void A () {

void C () {

... // position 1

}

...

C ();

}

void B (int flag) {

void D () {

...

B (1);

}

if (flag)

A ();

else

D ();

...

}

B (0);

...

}

The calling sequence for this program for execution to reach C is: main calls Foo, Foo calls B, B calls D, D calls B, B calls A, and A calls C.