Instruction: Analyze the user's review text and determine the overall sentiment expressed, then choose the corresponding sentiment option from the provided list (A: very positive, B: positive, C: neutral, D: negative, E: very negative) based on the identified sentiment.

Input:
great glow to these sights in the dark, I used a nylon punch to remove the old and install new rear sight and glock front sight tool on front, no sweat, no gunsmith, once the rear is where you want it a little blue threadlock on the center set screw using the included allen wrench secure the rear sight into place solidly.

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