Which closing uses correct capitalization?
a. you,
b.love,
c.your friend,
d.yours truly,

Generally, all of the above. The context of the "media" matters to answer this question properly, though. For instance, you don't need 2 or 3 if it's news, you only need to understand it, and make sure it comes from a reliable source.

You need 2 and 3 if it's something about a protest that you saw on some social media site (3 requires 2, by the way, you can't be compelled to action without an emotion being sparked).