Suppose a program has the string "COMSC $260"$ stored in source. The goal of the program is to store the reversed string, $"062$ CSMOC" in target. Part of the program is as follows:

$.$data

source BYTE "COMSC $260",0$

target BYTE SIZEOF source DUP$(?)$

$.$code

main PROC

mov ecx,SIZEOF source$-1$

L$1$:

mov al$,[$esi$]$

mov $[$edi$],$ al

dec esi

inc edi

loop L$1$

mov BYTE PTR $[$edi$],0$

For this program to work correctly, esi and edi must both be initialized correctly. Which of the options below correctly initializes both registers?

NOTE: The source string ends with a null terminator $(0).$ After the program finishes running, the target string will also end with a null terminator $(0).$

A$)$

mov esi, OFFSET $[$target $-1]$

mov edi, OFFSET $[$source $+$ SIZEOF source $+1]$

B$)$

mov esi, OFFSET $[$target $-1]$

mov edi, OFFSET $[$source $+$ SIZEOF source$]$

C$)$

mov esi, OFFSET $[$target $-2]$

mov edi, OFFSET $[$source $+$ SIZEOF source$]$

D$)$

mov esi, OFFSET $[$target $-2]$

mov edi, OFFSET $[$source $+$ SIZEOF source $+1]$