nction can have at most one global minimum.</label></li>
                <li><label><input type="radio" name="q2" value="2"> c) A convex function must be differentiable.</label></li>
                <li><label><input type="radio" name="q2" value="3"> d) A convex function must be twice differentiable.</label></li>
            </ul>
            <div class="feedback" id="feedback2"></div>
        </div>

        <div class="question">
            <p>Consider a convex function \( f : D \to \mathbb{R} \), where 