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:
so glad you sell these.  I use them for my sewing machine and they are very difficult to find.  they have done their job.

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