Task: Sentiment_Analysis
Instruction: Assess the user's sentiment in the provided review and select the appropriate sentiment option from the list as the answer.

Input:
I've order three of these trays: first in April 2010, then in  February 2011, then in March 2013. The reason I've ordered three is they work very well. They fit in my small toaster oven and are non-stick. However, over time they become grungy, meaning the nice gold color slowly becomes tarnished and dark spots build up on them that cannot be scrubbed off. Once they become too black, food begins to stick. But they are rather inexpensive and are available with Amazon Prime, so having to buy a new one occasionally is not too big of a problem. So I am giving them three stars for doing what they are supposed to do, but no more for not lasting very long.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: C: neutral