Answer:
The correct answer is letter "D": auction pricing.
Step-by-step explanation:
Auction pricing refers to buyers and sellers offering competitive bids at the same time. An example of auction pricing takes place in the stock market where buyers offer the highest price they are willing to pay and buyers take the lowest price they are willing to accept.
The internet has boosted the increase of auction markets since different sellers offer their products or services at different prices taking the most convenient bid that fulfills their expectations.