Concept:Anthrax is a fatal bacterial livestock disease that causes sudden death and bloody discharges from body openings.
Explanation:Sudden death with a black, tarry, bloody discharge from the nose, mouth, and eyes is a classic sign of anthrax.
Brucellosis mainly causes abortion and infertility in animals.
Pleuropneumonia affects the lungs and causes breathing difficulties.
Tuberculosis leads to chronic weight loss and lung lesions.
Thus, the disease that matches the given symptoms is anthrax.
Answer:A. anthrax