Yahoo's Shopping Portal Recently Began to Offer People Who Visited

Multiple Choice

Yahoo's shopping portal recently began to offer people who visited the site the ability to buy songs from Imix's collection of more than 200,000 tracks from record labels that include BMG and Sony Music Group. Customers can choose up to 70 minutes of music for around $1 per song. Then they can choose an art design and a title for each CD and have a disc shipped for $2.50. This is an example of:

A) mass customization.
B) market melding.
C) how the 80/20 rule is implemented.
D) market augmentation.