非谓语动词识别 — 英语选择题

下列四个句子中，加【】部分为现在分词短语作伴随状语的一项是（ ）A. 【Written in simple language】, the book appeals to beginners. B. He sat by the window, 【watching the rain fall】. C. 【To finish the report on time】, she stayed up all night. D. The question 【discussed yesterday】 remains unresolved.