叙述过去经历 — 英语选择题

昨晚八点，暴雨突然来临。当时我正在做作业。哪句话能准确叙述这段经历？A. When the rainstorm came, I was doing my homework. B. When the rainstorm was coming, I did my homework. C. While the rainstorm came, I was doing my homework. D. When the rainstorm came, I did doing my homework.