Soundz,a Marketer of High-End Headphones,wants to Better Understand How Consumers

Soundz,a marketer of high-end headphones,wants to better understand how consumers think and feel about its products.Which of the following would be the best tool to help the leadership at Soundz learn about consumer attitudes toward the brand?

A) an intelligent agent
B) reality mining
C) an ERP database
D) sentiment analysis
E) search engine optimization