Meta’s news ban is preventing Canadians from sharing vital information about the wildfires ripping through western Canada::Canadians are calling on Meta to lift its news ban so they can share news about the wildfires in the Northwest Territories and British Columbia.
From the text of the bill: https://www.parl.ca/DocumentViewer/en/44-1/bill/C-18/royal-assent
(b) sounds like just linking or indexing it would count as making it available, and thus require payment.
That seems to be backed up by at least a couple of the news sites: https://www.theglobeandmail.com/politics/article-bill-c18-online-news-law-explained/
https://ottawacitizen.com/news/politics/online-streaming-news-bills-whats-next