Bordetella Pertussis Is Classified as a Category II Organism; What

Bordetella pertussis is classified as a category II organism; what does this mean?

A) little to no pathogenic potential and standard sterile techniques are sufficient
B) pathogenic potential but generally not respiratory transmission
C) pathogenic potential and respiratory transmission possible
D) pathogenic potential and containment in pressurized labs
E) extremely dangerous pathogens and rigorous containment in pressurized suits and labs