Here's my preference (not an official requirement!):
(A) is too abbreviated--I haven't worked with Australian records and wouldn't understand it.
(B) is much better--but why not include the link also?
I don't like putting the citation in the text.
Basically, Evidence Explained, which Help: Sources says is 'the ideal citation format' (ideal, not required!) says to include both a description of the record, and also where you found it (the name and URL of the web page for an on-line record). The key is giving enough information that other people can find the record, even if it's not available where you found it (because the URL changes, or the records move from one archive to another, or ....)
So, I'd probably combine your (A) and (B), and even add more information--the name of the archive that has the document, the name of the web page and the date I looked at it (in case the URL stops working but is available through the WayBack machine or something similar ....). But I'll stress that isn't required by WikiTree.