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.