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

Input:
The bands seem very sturdy, but there was no exercise chart nor were there any instructions. So I don't know how to fasten or use the ankle strap or the door anchor, nor do I really know how to use the resistance band set except for what I hope to find on the internet. I find it frustrating when I'm sent something without any documentation and am expected to know how to use it intuitively.

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