The harder he worked (A), the most (B) troubles he had (C) in his early days as a scientist (D).
B
【译文】他工作越努力,在成为科学家的早期就不会有更多的麻烦: 本题考查固定用法。the+比较级,the+比较级,意为“越…就越…”。根据句意越努力工作就不会有更多的麻烦,故改成the less。