<p>The correct answer is <strong>(D) be held</strong>.</p>
<p>In this sentence, we have a subordinate clause introduced by the word "that." When we have a verb of requesting, suggesting, or demanding in the main clause, we use the subjunctive form of the verb in the subordinate clause. The subjunctive form is used to express a command, request, or recommendation. In this case, the subjunctive form of the verb "hold" is "be held."</p>
<p>Option (A) "is held" is incorrect because it uses the indicative form of the verb "hold" instead of the subjunctive form.</p>
<p>Option (B) "hold" is incorrect because it uses the base form of the verb "hold" instead of the subjunctive form.</p>
<p>Option (C) "held" is incorrect because it uses the past tense form of the verb "hold" instead of the subjunctive form.</p>