A trick question, that one: it's not a given that stopping the trolley is the only way to save anyone. I can simply warn the five people to get out of the way.
My follow up:
Assume you can visit one and only one city in the world for a week. Expenses are not an issue. Where do you go and why?
I would suggest that it's not the medium, but the quality of perception and expression, that determines the significance of art. But what would a cartoonist know? -Bill Watterson