Directions: In the following questions, there is a statement divided into five parts, when arranged properly forms a coherent sentence both grammatically and contextually. Choose the best alternative among the five options given below each statement as your answer.

were not protected in the epidemic, and (A)/ the outbreak was originally mistaken for Japanese encephalitis, (B)/ who had been vaccinated against Japanese encephalitis (C)/ but physicians in the area noted that persons (D)/ the number of cases among adults was unusual (E)/