Their work has stimulated research into microbes as possible reasons for other chronic inflammatory conditions, such as Crohn's disease, ulcerative colitis, rheumatoid arthritis and atherosclerosis, the Nobel assembly said.

Choose your answer: based on the paragraph above can we conclude that "Crohn's disease is more common than ulcerative colitis."?

pick from the following. [I] Yes. [II] It's impossible to say. [III] No.
I think the answer is