<p>An announcement about the new safety regulations <u>will be posted</u> in the production facility.</p>
<p>The correct answer is (C) <u>will be posted</u>.</p>
<p>In this sentence, we are talking about a future action, which is the posting of the announcement. The future tense is used to indicate an action that will happen at a later time. In English, the future tense is formed using "will" + the base form of the verb.</p>
<p>Option (A) "were posted" is incorrect because it uses the past tense, indicating that the action has already happened. This does not match the meaning of the sentence, which is discussing a future action.</p>
<p>Option (B) "have posted" is incorrect because it uses the present perfect tense, indicating an action that has been completed in the past but has a connection to the present. This does not match the meaning of the sentence, which is discussing a future action.</p>
<p>Option (D) "to post" is incorrect because it uses the infinitive form of the verb, which does not convey the future tense. The infinitive form is used to express the base form of the verb without indicating a specific tense.</p>
<p>Therefore, the correct answer is (C) <u>will be posted</u>, which accurately conveys the future tense and matches the meaning of the sentence.</p>