Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
This item melted and warped in the microwave the first time I used it! I couldn't believe it! It says clearly on the rim that it's for use in a microwave, but it couldn't take the heat!

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