<p>Attendees of the conference who <u>are making</u> presentations are required to provide their contact information to the organizer.</p>The subject of the sentence is "attendees," which is plural. Therefore, we need to use a plural verb form.
Option (A) "are making" is the correct form of the verb because it agrees with the plural subject "attendees." This option correctly expresses that the attendees are currently in the process of making presentations. <div><br></div><div>(B) "is making" is incorrect because "is" is a singular verb form and does not agree with the plural subject "attendees." </div><div>(C) "are made" is incorrect because it is in the passive voice and does not fit the context of the sentence. The sentence is discussing what the attendees themselves are doing, not what is being done to them.</div><div>(D) "has made" is incorrect because "has" is a singular verb form and does not agree with the plural subject "attendees." Additionally, the past tense "made" does not fit the context of the sentence, which is discussing a current requirement.</div>