Parents should educate their teens on the fact that shady things can happen on the internet, and teenagers should be taught not to chat with complete strangers on an online forum. It is then up to the teen to make the right choices when online based on what they have been taught.
Subjective: based on or influenced by personal experiences, beliefs, thoughts
I just copied and pasted this to see if anyone else had an answer, one person said B and that got 5 stars and a few thanks, so I'd go with B. Also, B seems objective because it is influenced by the person's feeling of the character.