Task: Sentiment_Analysis
Instruction: Determine the sentiment expressed by the user in her review from the provided choices, and respond by selecting one of the available options.

Input:
Didn't suction to my face very well. I can swim at a moderate pace in them but I can't even flip turn without it immediately filling with water. Works fine for casual swimmers though.

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