Which of the following is not one of the unique features of e-commerce technology?

Information asymmetry refers to a situation where one party has more or better information than another in a transaction, which is a common occurrence in many markets, not unique to e-commerce. The correct answer identifies this concept as a broader economic principle rather than a distinctive feature of e-commerce technology.

In contrast, information density pertains to the vast amount of information available in e-commerce, allowing consumers and businesses to make more informed decisions. Richness denotes the ability of e-commerce to provide a wide variety of multimedia content and personalized experiences, enhancing user engagement. Interactivity reflects how users can interact with content and with each other in real-time, a crucial aspect of online transactions and marketing. These features are integral to the e-commerce experience and differentiate it from traditional commerce.