This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to treat dog splinters
Find the splinter.
Depending on how deeply embedded they are in the skin, splinters are not always easy to see right away. Your dog will probably let you know with his body language where the splinter is.

Available choices: I. For example, your dog may continually paw at his mouth to try to remove a splinter in a particular paw. He may also lick and bite at whichever area has the splinter. II. It might be inches deep or embedded deep enough to make you uncomfortable. Carefully locate and hold the splinter with two hands. III. However, you will definitely notice this difference later on. Pain marks, small splinters stuck where blood vessels enter their skin, may also be discomfort. IV. You should also be able to tell the splinter is fairly deep within the skin. You can insert an ice pack or cold compress around the splinter, treating deep fissures.
The answer is:
I.