In hopes of earning a few dollars on belongings they no longer use or want, some people take their household items to consignment shops, while other people sell their items on eBay. Which method of selling can be argued to have more structural holes?

A. Selling through a consignment shop, because buyers are prevented from negotiating with sellers.
B. Selling via eBay, because buyers and sellers can negotiate without third-party interference.
C. Selling via a consignment shop, because everyone (buyers, sellers, shop owners) benefits.
D. Selling via eBay, because structural holes increase as the number of bids increases.