Read this excerpt from Susan butcher and the iditarod trail. the hospital was a large, two-story building, but Dr. welch decided not to admin the diphtheria patients. he kept them isolated in their homes and treated them there one at a time. this would help contain the disease.

A. it was rare for someone to become infected with diphtheria
B. the doctor did not know how to treat patients with diphtheria
C. the hospital did not have enough room for the diphtheria patients
D. it was easy for diphtheria to pass from person to person