<p><span style="color:#8e44ad;"><span style="font-size:20px;">Deductions from the Given Information</span></span></p>
<p>We know that both $c$ and $d$ are greater than 0, but we don't know much beyond this:</p>
<p><span style="color:#27ae60;"><span style="font-size:20px;">Solving the Problem</span></span></p>
<p>We can use <span style="color:#8e44ad;"><strong>Equal not Equal Strategy</strong></span> to solve this:</p>
<table border="1" cellpadding="1" cellspacing="1">
<thead>
<tr>
<th scope="col">c</th>
<th scope="col">d</th>
<th scope="col">QA</th>
<th scope="col">QB</th>
<th scope="col">Status</th>
</tr>
</thead>
<tbody>
<tr>
<td>$1$</td>
<td>$1$</td>
<td>$\frac{1}{1} = 1$</td>
<td>$\frac{1+3}{1+3} = \frac{4}{4} = 1$</td>
<td>Equal</td>
</tr>
<tr>
<td>$1$</td>
<td>$2$</td>
<td>$\frac{1}{2} = 0.5$</td>
<td>$\frac{1+3}{2+3} = \frac{4}{5} = 0.8$</td>
<td>Not Equal</td>
</tr>
</tbody>
</table>
<p>As we can see if $c$ and $d$ are the same, then QA and QB are equal, otherwise, they are not equal.</p>
<p>So, we must choose <span style="color:#27ae60;">D</span>.</p>