Instruction: Assess the user's sentiment in the provided review and select the appropriate sentiment option from the list as the answer.

Input:
I bought this to use with my iPhone (1st Gen).  I plugged it in, pushed play, and sound only came out through the iPhone's speaker.  I pushed the cord in as hard as I could and it started playing through the headphones, but I had to hold it in that position or it would come out.  After inspection, I saw that it was just the black rubber that was preventing it from going all the way in.  So, I took a pocket knife and shaved about 1/16 inch of the rubber off and now it works fine.  Only do this if you have common sense with a knife, however.  It's fairly dangerous.  The sound is great.  I'm just glad I don't have to send them back.

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