Correct option is A
Option (a) contains an error.
· Explanation: The phrase "No one may deny" is inappropriate here. Since the statement reflects a strong certainty about a past fact, "can" is more appropriate than "may." Therefore, "No one can deny" should be used instead of "No one may deny."
· Grammatical Rule Used: "Can" is used for statements of factual certainty, whereas "may" indicates permission or possibility, which does not fit the context here.
· Example: No one can deny the importance of education.