题目内容：
In the（ ），businesses offer services for which they charge a fee that is based on the number of size of transactions they process.Some of these services lend themselves well to operating on the Web.
A.Fee-for-Transaction Revenue] Model
B.Advertising-Supported] Revenue] Models
C.Web] Catalogue] Revenue] Models
D.Value] chain
参考答案：【答案仅供学习，请勿对照自行用药等】