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:
I used this whistle while serving as drum major for a college marching band.  In a loud stadium with over 90,000 fans, this whistle can still be easily heard across the field or throughout the stands because of its high frequency.

A lot of referees prefer this whistle as well because of its quick response and loud sound.  The small Acme Thunderer is much more responsive than its larger counterpart.

Highly recommended!

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