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:
This is a life saver for anyone who needs to hook up several phone systems and has a limited amount of phone jacks. I hooked up the main jack which had  2 hookups on it. Then I bought an extra extension system and put them in my rooms. I cannot express how much I love this system. Excellent investment.

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