Pick the correct sentence.

The English language is distinguished by eight parts of speech. They can be categorised as nouns, adjectives, pronouns, verbs, adverbs, conjunction, proposition, and interjection. Modal auxiliaries or modals are verbs used with another verb to express a variety of meanings. Based on the meanings expressed, modal auxiliaries can be categorised into five types: modals that express permission, modals that indicate likelihood, modals used to give advice, modals that denote ability, and modal auxiliaries that denote obligation. “May” denotes possibility, permission, and wish, and “might” is the past of “may,” which can also denote possibility or permission. In the first option, the speaker sounds uncertain, whereas the third option sounds like a wish, which is irrelevant to the context. The second option is correct because “may not” is used formally to indicate refusal of permission in an emphatic manner.