以下是网页答题的源代码怎么能找出<div class="extra hidden">的值也就是正确答案

<h1>评估前测试</h1>
<form id="assessment_form" name="assessment_form" action="assessment.php?c=e806216bd6ceb6783c2e3d154cada233" method="post">
<div>
<div id="question_1" class="card" >
<input type="hidden" name="id_question[]" value="29888" />
<input type="hidden" name="question_type[]" value="multiple-choice" />
<input type="hidden" name="question_difficulty[]" value="1" />
<input type="hidden" id="question_answered_status_1" name="question_answered_status[]" value="0" />
<div class="question-wrapper" data-qNumber="1" >
<div class="question-number">1</div>
<div class="question">

我们为什么需要问题追踪工具？请选择一个正确原因。
</div>
</div>
<div class="extra hidden">

<label class="option" for="answer_1_0" >
<input type="radio" id="answer_1_0" name="answer_1[]" value="a" class="radio_answer" onclick="javascript: assessment.answeredQuestion( 1 );" />
<div>
[A] 为了安排后续跟进流程。
</div>
</label>

<label class="option" for="answer_1_1" >
<input type="radio" id="answer_1_1" name="answer_1[]" value="b" class="radio_answer" onclick="javascript: assessment.answeredQuestion( 1 );" />
<div>
[B] 为了记录那些不希望其再次入住的问题客人。
</div>
</label>

<label class="option" for="answer_1_2" >
<input type="radio" id="answer_1_2" name="answer_1[]" value="c" class="radio_answer" onclick="javascript: assessment.answeredQuestion( 1 );" />
<div>
[C] 为了帮助我们聆听客人的投诉。
</div>
</label>

<label class="option" for="answer_1_3" >
<input type="radio" id="answer_1_3" name="answer_1[]" value="d" class="radio_answer" onclick="javascript: assessment.answeredQuestion( 1 );" />
<div>
[D] 为了帮助我们与客人感同身受。
</div>
</label>

相关了解……