It's not C. There should be a comma where the semi colon is
A process by which a person becomes protected against a disease through vaccination.
Example:include tetanus, diphtheria, mumps, measles, pertussis (whooping cough), meningitis, and polio
the top one
Explanation:
I'm not sure what this is for but all school leavers should have a lot more done than 3 months of work experience.
Whitman celebrates the common person