In Which of the Following Forms of E-Commerce, Is There

Multiple Choice

In which of the following forms of e-commerce, is there much room for negotiation on price, payment and delivery options, quantity, quality, and options and features?

A) Consumer-to-consumer (C2C) e-commerce
B) Business-to-business (B2B) e-commerce
C) Consumer-to-business (C2B) e-commerce
D) Business-to-consumer (B2C) e-commerce