4. What are the symptoms of the illness Yersinosis?
A. Enlarged lymph nodes; headache; muscle aches
B. Nausea; vomiting: profuse sweating
C. Nausea; occasional vomiting
D. Fever, abdominal pain; bloody diarrhea

D. Fever, abdominal pain; bloody diarrhea

Explanation:

Yersiniosis is an infectious disease caused by a bacterium of the genus Yersinia. Most often young children get this because they put anything on their mouth and there bacterias can live on external surfaces and can get inside host's body if they find an entrance like mouth.

again, you should probably take him to the vet. goodluck