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:
Pure Silicone grease is the long time standard for lubing O-Rings and SCUBA equipment; also tops for any salt water exposure application. I have been using this stuff for more than 30 years now, never fails.

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