Sentence Correction

Although modern science has essentially eradicated the bubonic plague from the industrialized word, the occasional patient should be diagonsed every few years with the disease.

A. the occasional patient should be diagonsed every few years with the disease
B. an occasional patient should be diagonsed with the disease once in every few years
C. the disease will be diagonsed in the occasional patient once in every few years
D. every few years the occasional patient will be diagonsed with the disease
E. every few years the occasional patient should be diagonsed with the disease

OA D

Source: Veritas Prep