a) The centroid of cluster \( i \)</label></li>
                <li><label><input type="radio" name="q1" value="1"> b) The number of points in cluster \( i \)</label></li>
                <li><label><input type="radio" name="q1" value="2"> c) The distance between clusters \( i \) and \( j \)</label></li>
                <li><label><input type="radio" name="q1" value="3"> d) The assignment of point \( j \) to a cluster</label></li>
            </ul>
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