I don’t understand this question
![I dont understand this question class=](https://us-static.z-dn.net/files/d74/e7a7aa8b16abf4ced583540a23a1c1e9.png)
Step-by-step explanation:
step 1. a polynomial must have whole non negative exponents
step 2. A, B, D have negative exponents
step 3. C is a polynomial.