Answer:
The risks that children face etc.
Explanation:
We have to keep in mind that we´re talking about the people's views, and not the Parents as such. So we can cross out the first two that mention Parents. Although I believe in media´s influence I doubt it very much that America's news - this is not very exact: it could be the news in Chile - is very different from any other country in this respect.
So there remains only one, which seems to be the most reliable and logic explanation. Especially when we focus on Perceived - but unreal - risk.