Use Case B to Answer the Following Questions

Use Case B to answer The Following questions
CASE B
Mr. Jones, a 30-year old male, presents for his 6-month continued-care appointment. His health and pharmacologic histories reveal that he is taking an antidepressant drug. He has very tight contacts between his teeth and reports that flossing frustrates him. He smokes one-half pack of cigarettes daily. Intraoral assessment findings reveal a coated tongue, generalized brown extrinsic stains covering most of the lingual surfaces, generalized moderate gingivitis, and light interproximal calculus. Periodontal probe readings and radiographs reveal healthy teeth and periodontium with no bone loss. Recently separated from his long-time girlfriend, Mr. Jones is concerned about his self-image and wonders if he has "bad breath." He is interested in having his teeth whitened to improve his appearance and has requested your guidance in making his oral health care decisions.
-All of the following may contribute to oral malodor EXCEPT one. Which one is the EXCEPTION?

A) Active periodontal disease
B) Aphthous ulcer
C) Use of tobacco products
D) Lack of tongue brushing