While over 90% of populations that live in closed environments (such as military bases,dormitories and day-care centers are carriers)only 1 of 1000 carriers will have meningitis.This statement refers to _____.
A)Neisseria meningitidis B)Haemophilus influenzae type B C)Streptococcus pneumoniae D)Haemophilus influenzae type F