<p>In this sentence, the chief executive is advising all personnel about limiting their requests for office supplies. The word "advises" is followed by the noun clause "all personnel <strong>that</strong> they should limit their requests for office supplies."<br></p>
<p>The word "that" is used to introduce the noun clause and connects the advice given by the chief executive to the action that personnel should take. It is commonly used after verbs of advising, suggesting, and commanding.</p>
<p>For example:</p>
<ul>
<li>The teacher advised the students <strong>that</strong> they should study harder for the exam.</li>
<li>The manager suggested <strong>that</strong> we have a team meeting to discuss the project.</li>
<li>The captain commanded the soldiers <strong>that</strong> they should march in formation.</li>
</ul>
<p>Therefore, the correct answer is <strong>(A) that</strong>.</p>