What Do Margalit and Walzer Say Israel Should Act If

What do Margalit and Walzer say Israel should act if civilians are being used as "human shields"?

A) It is unfortunate that civilians are used as "human shields" but if their governments do not respect their rights, Israel has no obligation to respect their rights either.
B) There are no "innocent civilians" in societies that allow terrorists to operate; therefore a civilian who is being used as a 'human shield" is implicitly an enemy combatant and therefore may be justly killed.
C) Israel should act as if the civilians who are being used as human shields were Israeli citizens.
D) All of the above