When auscultating an animal's lungs, you separate the right and left thorax into quadrants.
a. seven
b. nine
c. five
d. three?

The answer to this question would be nine quadrants

Auscultating is an examination where you put stethoscope into the patient chest and try to hear their breathing/heart sound. The lung is a big organ but contains multiple lobes, so when there is an abnormality in a part the sound might not be heard in the other lobes.
It is important to auscultate the lung into at least 9 quadrants so you won't miss it.