Which of the Following Is NOT an Example of Metacommunication

Which of the following is NOT an example of metacommunication?

A) Adding a smiley at the end of a text message.
B) Saying, "We need to talk about how we've been arguing so much lately."
C) Winking to show you aren't really serious when you say something that sounds serious.
D) Asking questions to show you are listening to the other person.