Instruction: Carefully assess the user's review for any strong expressions of sentiment, either positive or negative. Based on your analysis, select the most fitting sentiment option from the provided list as output.

Input:
I believe I have biting bird mites in my place and this has been helpful, but I had to get 4 of them as the ultra sound doesn't penetrate into closets, thick blankets, or through my body.  The bugs are very good at finding hiding places.  As soon as I started using these gadgets, the bugs were biting me less but they were running to hide in my orifices: eyes, ears, nose, and what's in the groin.  Very annoying, of course!

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