Question

Against an enemy, however, it is

______________
used as a weapon of great power.

Which best identifies the word(s) that the underlined phrase modifies?

Power

It

Weapon

Is used

Answer 1

the anwser to this question is weapon

Answer 2

I believe that the answer is is used because if you rephrase the sentence to say "A weapon of great power is used against an enemy" you can see that is used is what is happening against the enemy.