Which of the following could be illegal?

a. euthanizing a healthy animal
b. not petting and interacting with an animal
c. performing medically unnecessary surgery on an animal
d. not providing an animal with food and water

D. Because euthanizing a healthy animal happens all the time not petting or interacting is also legal though not ideal. And preforming medically surgeries that aren't necessary also happens a lot. People who don't feed or water their animals usually get into trouble getting fined and having animals taken away