Sentence1: Jim was farting a lot more than usual. Sentence2: His wife became concerned because they smelled unusually terrible. Sentence3: She insisted that he go see a doctor. Sentence4: Jim's doctor told him he is becoming lactose intolerant. 
 (A) Jim's wife decided he should have a dairy-rich diet. (B) Jim's wife was relieved to find the source of the problem.
A