What is the procedure used to diagnose bladder abnormalities such as stones, inflammation, masses, and traumas?

The superior diagnostic method is ultrasound, but not all veterinary centers have an ultrasound machine or enough experience to make a good ultrasound diagnosis.
The cystography is still used in cases where ultrasound is not available or the veterinarian does not have enough experience to make a good diagnosis.
If a bladder rupture occurs, cystography can offer more precise information than ultrasound, as ultrasound findings can be doubtful, while the extravasation of contrast medium into the peritoneal cavity always confirms the diagnosis.
a) Only I is correct.
b) I and II are correct.
c) II and III are correct.
d) All statements are correct.