I apologise if this is the wrong section to ask but the question seemed to be posed as a moral question so here seems right.
Ok, when i was in secondary school our religion teacher asked us a question one day, it was to do with something we were learning but i cant remember the topic.
The question was
You are a jewish woman living in Germany with your family during the second world war and the nazis are raiding your street so you hide all the family under the stairs. Your baby has whooping cough and you know will be heard by the nazis leading you all to be discovered. Do you a) put your hand over your baby's mouth or b) risk the whole family being found and killed?
I cant remember how exactly but the way out teacher asked the question implied that putting the hand over the baby's mouth would suffocate it so this is what we as a class believed we were debating. We talked and talked and some of the class got upset. Eventually the teacher wrapped things up as the bell was going to go and she asked us "do you want to know what i would do?" (She was a former nun and we all believed her to have a high moral standard) we said yes if course and she said that she would have put her hand over the baby's because the baby can also breathe through its nose.
At the time we thought "ahh, very clever miss, you're so smart" 
But recently the question came back to me and i've wondered what the point if it was. It's hardly a moral one if one option means death for all and the other means safety for all. That's an easy question. And it's not a brain teaser as it really wasnt posed like that at all, it was part of a wider discussion that i cant recall but i know was serious.
I've since seen the same question asked on some tv quiz show (i think QI) and again, dont understand the point of it except for the 'asker' to give themselves a little pat on the back for knowing something the 'debaters' dont 
Can anyone shed any light on this? What am i missing?