Even today, a century after Pasteur developed the first vacc

Even today, a century after Pasteur developed the first vaccine, rabies almost always kills its victims unless inoculated in the earliest stages of the disease.

A . its victims unless inoculated
B . its victims unless they are inoculated
C . its victims unless inoculation is done
D . the victims unless there is an inoculation
E . the victims unless inoculated

OA B

Source: Princeton Review