The Graph Below Shows That After the Childhood Vaccination Program

The graph below shows that after the childhood vaccination program was initiated in the United Kingdom in 1999,the annual number of meningitis cases in children

A) decreased to nearly zero by 2004, as did the meningitis rate for adults.
B) increased to over 700 in 1999 before slowly decreasing in 2000, as did the meningitis rate for adults.
C) did not decrease or increase; there was also no change in the meningitis rate for adults.
D) decreased to zero by 2000, as did the meningitis rate for adults.