Multi-choice problem: Continue writing the next sentence in this paragraph:

How to tell if your dog has fleas
Watch your dog for excessive scratching or chewing.
Flea bites are extremely itchy, so the first sign of a flea infestation is usually seeing your dog scratching or chewing itself more than usual.
Other behavioral signs of fleas might include head shaking, hair loss, scabs, or hot spots.

OPT: A. Examine your dog's skin for tiny, red, raised bumps. Are usually smaller than other insect bites.. B. Fleas can also cause skin irritations, so be on the lookout for these. Feed your dog the right amount of treats.. C. With flea bites, your dog will scratch excessively. Your dog's fur may also get wet, so help your dog out if it's currently having fleas.. D. Watch your dog for double or triple flea infestations. These are relatively rare and only appear once your dog starts having flea hairballs..
A.