Answer:
(B) B2B, B2C, C2C, and C2B.
Step-by-step explanation:
Business to business B2B this is the ecommerce most profitable model, represent when a company brings services to another company.
Business to Consumer B2C, this model is the most commonly used model, it implies a transaction or buying process between a company and a person or consumer. Like a supermarket platform as an example.
Consumer to consumer C2C , are products or services provided by a consumer to another consumer, commonly the transaction is made through a virtual platform that will ask for a commission.
Finally consumer to business C2B, is when a consumer or person offers services to a company, a good example is when an influencer does advertisement for a company, in this case the influencer gets the income offering his services directly to a business.