Bubonic plague is
a. a deadly bacterial disease that predominantly transmitted from humans to humans by the air.
b. a deadly zoonotic viral disease that predominantly transmitted from animals to humans by the bite of infected fleas.
c. a deadlybacterial disease that predominantly transmitted from humans to humans by the bite of infected tsetse flies.
d. a deadly zoonotic bacterial disease that predominantly transmitted from animals to humans by the bite of infected fleas.