Sentence1: Brandon was given a 10 page research paper to write for class. Sentence2: He begun working on the paper on his 2003 Dell laptop. Sentence3: Brandon stayed up until 1 in the morning to try and finish his paper. Sentence4: Suddenly, his computer crashed and died. 
 (A) When he finished his paper he went to bed. (B) Luckily he had been saving everything on an external disk.
B