题目内容：
It can be inferred from the last two paragraphs that __
A．well-being can be affected if one actively uses Facebook B．subjects' mood changed when they messaged others through Facebook
C．using Facebook is bad for well-being when people graze its content
D．it's good for people to post their idealized lives on Facebook
参考答案：【答案仅供学习，请勿对照自行用药等】
答案解析：