I don't know much about the Sydney mines, but from the context, I can infer that the tunnels were unsafe. Whether being that they were collapsing, or they were filled with poisonous gasses.
Answer:
review the facts
Explanation:
If your goal is accuracy, which is the quality or state of being correct or precise, you definitely need to review the facts.
For the first one:
B.) Historical documents, eyewitness accounts, etc. that provide direct or firsthand evidence about an event, object, person, or work of art.
For the second one:
B.) Her mother stared at her (because "stared" sounds more threatening than "looked").
Hope this helps!
