Answer: B) summarizes the whole article.
Step-by-step explanation: In the given excerpt we can see the story of how Roald Dahl started his writing career, it explains how he used the details of his experiences in life (like his participation in war, and him attending boarding school in England and eating chocolate samples from a factory near the school), as an inspiration to write his books, the last sentence of the excerpt, concludes the text by summarizing the whole article.