<span>I believe that the theme is about letting go (King Trident & Ariel), following your heart (Ariel & Herself), trickery (Ursala & Ariel) there are many themes in the Little Mermaid movie. Those are just a few.
Hope this helps! :)</span>
This sentence is messy, as well as a run-on. Here's a revised version:
"It becomes easy to gossip among the office, but remember; it is just as easy to keep it a secret!"
There is proper punctuation added to make it easier to read. It also adds personality and emotion to the sentence. Try reading the two aloud and compare them. You can make changes to it if you feel it necessary.
This is a hard one and I can see why you decided to post it here. B is most definitely wrong but the other three are all neck and neck. There are both even pros and cons of A and C but I think it would be more reasonable to adopt a general routine. So I think the answer would be C.
If you can't find all the needed elements for an MLA citation of an Internet source you can A. Omit a citation for the source.