What is the correctly nested markup for this list?
<ul> <li>office</li> <li>staple</li> <li>paper</li> <li>groceries</li> <li>milk</li> </ul>
<ul> <li> Office Supplies <ul> <li>Stapler</li> <li>Paper clips</li> </ul> </li> <li> Groceries <ul> <li>Milk</li> </ul> </li> </ul>
<ul> <li> office <ol style="circle"> <li>staple</li> <li>paper</li> </ol> </li> <li> groceries <ol style="circle"> <li>milk</li> </ol> </li> </ul>
