​An oral auction

A) ​is also called a Vickrey auction
B) is conducted by bidders submitting a single sealed bid
C) is where the sole remaining bidder wins and pays his winning bid
D) ​all of the above

Oral Auction

A public sale where goods or property are sold to the highest bidder through spoken bids, typically led by an auctioneer.

Vickrey Auction

A sealed-bid auction where the highest bidder wins but pays the price offered by the second-highest bidder.

Sealed Bid

A bidding process where all bids are kept confidential until a specified time, ensuring fair competition and preventing bid adjustments.