Stack Initialization

If the variables below are properly initialized, and if all accesses to $S$ respect the array $,$ then the code below implements the stack operations Push and Pop. Note that the stack is held in an array $S[0..N-1]$ indexed by the variable $i.$

Push: begin $i$:$=i-1$;$,S[i]$:$=x$ end

Pop: begin $x$:$=S[i]$;$,i$:$=i+1$ end

Which of the following statements correctly initializes i for this implementation of a stack?

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$10$

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