The answer is A) Before overland traveling was comfortable or safe
I think: The plague was unavoidable, and unpredictable in regards to whom it would affect.
The best place to add the sentence would be A, after sentence 3
Answer:
heme: An ordinary life can change completely in just a moment. C. Ghostgirl, Tonya Hurley Charlotte Usher feels practically invisible at school, and then one day she really "is" invisible. Even worse: she's dead.
Explanation: