A: Derived from the Latin "vacca", meaning “cow”
B: Derived from Greek/Latin "vas kine", meaning "go move"
C: A derivative of the nickname Vaxinella, which was how Edward Jenner referred to his niece, Lady Mary Wortley Montagu
D: It was either going to be named "Pox-begone" or "Vaccine", and Jenner chose the latter
A