What's incorrect in the following table structure?
<table> <td>Cell 1</td> <td>Cell 2</td> </table>
The <td> elements should be inside a <tr> element
<td>
<tr>
The <table> tag should be self-closing
<table>
<td> elements should have a rowspan attribute
rowspan
<td> should be replaced by <th>
<th>