Multi-select problem: How does the next paragraph end?

How to diagnose illness in an emu
Check for diarrhea.
Normal emu excrement is soft, but not runny or watery. Runny or water excrement, or diarrhea, is often a sign of disease in emu.

Pick your answer from:
(I). Food may be large and a cat may vomit, leading to a very watery or frothy discharge. If diarrhea and vomiting become serious, call your vet to come in to have an x-ray done..
(II). Check your emu for a complete stool smear and poop smear to confirm, if available, that stool is diarrhea-like. Check your emu's stool smear..
(III). To look for diarrhea, call your vet right away. Signs of diarrhea may include watery stool, choking on mucus, or bloody stools..
(IV). While changes in diet will cause diarrhea, there are many diseases that may require treatment that also cause diarrhea. These include bacterial infections, avian influenza, fowl cholera, staphylococcus, as well as many other diseases that affect emu..
(IV).