Final answer:
Antibiotics are the medications used for the treatment of inflammatory bowel disease.
Step-by-step explanation:
Inflammatory bowel disease (IBD) is a collection of inflammatory conditions primarily affecting the intestines. The two main types of IBD are Crohn's disease and ulcerative colitis. When it comes to the medications used to treat IBD, the correct option is a) Antibiotics. Antibiotics can be used to treat complications and infections associated with Crohn's disease and ulcerative colitis. They help reduce inflammation and control bacterial overgrowth in the intestines.