Concept:The sentence expresses certainty that no argument is possible.It requires a present-tense modal verb that fits this fixed expression.Explanation:The phrase "there can be no argument" means "it is impossible to argue.""Can" is used to show that something is possible or not possible in the present."Could" is more tentative or past-oriented, so it does not fit the definite tone."Can't" and "couldn't" would make the sentence negative and unnatural here.Therefore, the correct completion is "can."Answer:C. can