Sentence Correction (SC) | Re: Crohn's disease, not to be confused with ulcerative colitis, not only

Crohn's disease, not to be confused with ulcerative colitis,not only causes inflammation and ulcers but can create a number of abnormal openings or connections in the intestine.


A.not only causes inflammation and ulcersbut can create a number --> "not only ... butalso " missing

B. not onlycauses inflammation and ulcers but alsoa number --> not parallel

C. causes inflammation and ulcersbut also can create a number --> "not only ... butalso " missing

D. not
...

---