Final answer:
Consistent high download speeds are not a direct benefit of B2C e-commerce for consumers, as they are more associated with internet service quality and infrastructure.
Step-by-step explanation:
Among the given options, the one that is not a benefit of B2C e-commerce for consumers is d. Consistent high Download Speeds. While B2C e-commerce can indeed lead to benefits like lower prices due to increased competition and reduced overhead costs, the ability to shop 24/7 for convenience, and improved customer service through various online support channels, consistent high download speeds are more related to internet service providers and the technology infrastructure rather than the direct result of e-commerce practices.