Marketing analysts use "gain index" to evaluate model performance. A gain index is the ratio of how a consumer performs versus how consumers on average perform. Which of the following is true?

A. Given 10 segments, if the indices range from 80-120 that would indicate a good model

B. Give 10 segments, if the indices range from 20-400 that would indicate a really nice model, good separation between consumer segments.

C. Given 10 segments, if the indices range from 101-1000 that would be fantastic, all segments perform better than average.

D. Given 10 segments, if the indices range from 0-100, that would be reasonable and dissappointing