Using protected inheritance
<p>In preparation for an exam I'm looking at an old exam and there's one question I just can't find an answer to. I don't have the correct solution to the answer and my teacher has been MIA for a while.
The question is not originally in english.</p>

<p>Suppose that a class CI inherits from the class Sup like: <code>class CI : protected Sup {</code>.
Why is this not a classifying inheritance?</p>
