Question: In a 3GPP system facilitating e-commerce, what is the role of the serving network when acting as a merchant for soft goods (e.g., information, video, audio)?
Option 1: The serving network must use external electronic payment mechanisms exclusively.
Option 2: The serving network may charge users directly, utilizing either collected charging information or micropayment mechanisms.
Option 3: The serving network is prohibited from engaging in direct financial transactions for soft goods.
Option 4: The serving network's involvement is limited to providing basic communications transport only.
Explanation: This answer highlights the flexibility and capability of the serving network when it assumes the role of a merchant for digital or soft goods. By allowing direct charging, either through gathered billing information or micropayment systems, the 3GPP system accommodates streamlined financial transactions within the telecom network's ecosystem, enhancing user experience and facilitating e-commerce.