No. They're heroes in everyday life. You could call police officers heroes A hero is a person idolized for their courage.
The beginning starts off with "has taught" indicating a foreword. The passage also talks about past achievements and accomplishments.
I would say that A is the answer. B is irrelevant, C makes the point debatable as it acknowledges that not everyone has access and I feel like A is more important than D to the sort of people who would set questions
