Cedric has a low fever and minor aches. Yesterday, he went to the doctor for his booster shot and received the flu shot. Which best explains why he has this reaction?
A
Cedric was given an antibiotic.B
Cedric was too old for the vaccine.C
The weakened virus stimulated the immune response and resulted in the minor reaction.D
The vaccine contained antibodies that caused Cedric to make more antibodies.