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

Input:
Poor quality, The right optic has become fogged in the lower 1/3 of the field of view.  This happened after traveling through 90 degree heat followed by a cold snap (50's) in Wyoming.  Binocular never got wet.  I would not buy this product again.

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