Which of the following best describes an e-commerce transaction system?

A.
It operates like an atomic reaction: One event sets off a series of events that quickly result in an
explosion of activity.

B.
It operates like the open-source community: Individuals will not use propriety solutions.

C.
It operates like a chain: One broken link causes problems for the entire system.

D.
It operates like a retail sales transaction: Personal interaction influences buying decisions.