Please need explanation for Writing question

<p>I swear this sentence seems correct to me but there is an error :/ And I cannot understand why it is wrong. I write the correct answer at the bottom.</p>

<p>He was <somewhat> (A) uncertain about <how to="" use=""> (B) the new machine and <asked for=""> (C) <more specific=""> (D) instructions be sent. <no error=""> (E)</no></more></asked></how></somewhat></p>

<p>(C)</p>

<p>please help?</p>

<p>asked THAT more specific instructions be sent. </p>

<p>This is a subjunctive.</p>

<p>[url=&lt;a href=“Subjunctive | Grammar | EnglishClub”&gt;Subjunctive | Grammar | EnglishClub]Subjunctive[/url</a>]</p>

<p>thanks so much!</p>