Step 1: Context.
This line reflects a philosophical theme about fulfilment and its opposite, belonging to the text *Two Horizons*.
Step 2: Option Analysis.
(A) Two Horizons: Correct — The quote is from this work.
(B) Sun and Moon: Incorrect — A different story, unrelated to fulfilment.
(C) The Bet: Incorrect — Deals with imprisonment and value of life, not this theme.
(D) Allergy: Incorrect — Focuses on personal struggles, not fulfilment.
Step 3: Conclusion.
The correct source is Two Horizons.
“One of these days you’re going to talk yourself into a load of trouble,” her father said aggressively. What do you learn about Sophie’s father from these lines? (Going Places)