Instruction: Determine the sentiment expressed by the user in her review from the provided choices, and respond by selecting one of the available options.

Input:
We have a Proform Crosswalk Treadmill.  We got the idea for this lube in the instruction manual as to what type we needed.  Actually, the manaul is  a bit slack as to troubleshooting.  Anyway, we ordered this lube and used the two tubes.  It really solved the problem.  The problem was that the belt would slow when I stepped on it but ran fine when off of it.  The lube is easy to put on.  The instuctions are very clear.  I recommend to check your manual first before getting any lube to make sure you are getting the right lube for your treadmill.

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