4. What sentence from paragraph 2 best develops the idea that young people today better understand the problems with social media? The article is Teens say social media isn't as bad for them as you might think.

A "No cohort until now has had such complete smartphone and social media penetration."

B "I mean, things are really different now: A decade ago, people were still using MySpace on desktops."

C "The internet can be a dangerous place, but teens now have the self-awareness to know when it's time to unplug."

D "Much research has focused on social media being a huge waste of time at best, a facilitator of ideological bubbles, and a dangerous, hostile experience for young people at worst."​