Which statements are true regarding the disease brucellosis and its etiological agent?

Which statements are true regarding the disease brucellosis and its etiological agent? Select all that apply.

a. other names for the disease include undulant fever or Malta fever

b. Brucella spp. usually infect only domesticated animals

c. brucellosis is primarily caused by five different species of Brucella

d. the CDC monitors these pathogens because they may be used as a bioterrorism agent