Final answer:
The mixed model is the e-commerce business model that generates revenue from more than one source, aiding in income stabilization by diversifying revenue streams.
Step-by-step explanation:
The correct answer is b. mixed. The mixed model in e-commerce is a business model that refers to generating revenue from more than one source. This approach can help a business stabilize its income by diversifying the ways it makes money, which could include a combination of sales, subscription fees, advertising revenue, and other streams. It is important to understand that this model considers the variability in customer arrival times and the fluctuation in customer flow throughout the day, which are real-world factors that can influence the success of an e-commerce business.