Teacher: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 end sentence choices from (A) and (B), such that the story does not sound complete and coherent, i.e., select an incorrect end sentence.
Teacher: Now, understand the problem? Solve this instance: Sentence1: Sam loved his old belt. Sentence2: He matched it with everything. Sentence3: Unfortunately he gained too much weight. Sentence4: It became too small. 
 (A) Sam went on a diet. (B) Sam was happy.
Student:
B