Instructions: In this task, you're given four sentences of a story written in natural language. The given story is not complete and your job is to complete the story by selecting one of the sentence choices from (A) and (B), such that the story sounds fully coherent.
Input: Sentence1: Sam regretted not starting his history essay earlier. Sentence2: He typed up his closing paragraphs. Sentence3: All of a sudden, his screen was covered in a large blue error message. Sentence4: Sam shrugged and restarted his computer. 
 (A) He was disappointed in his broken computer. (B) He was happy about his computer.
Output:
A