The suffix here would be 'ment', which means 'an act of, a state of, or a result of'. The suffix 'ment' changes the word from a verb to a noun, therefore to argue is a verb and becomes an argument which is a noun, to disagree is a verb and becomes a disagreement which is a noun. Therefore to define argument using this logic and one of the four options given the correct answer would be C. state of disagreement.
<span>She recognizes the futility of her effort.</span>
