Which of the Following Assumptions Will Lead to Identical Expected

Multiple Choice

Which of the following assumptions will lead to identical expected revenues under the English,sealed-bid,Dutch,and Vickrey auctions?

A) The true value of the good being auctioned is uncertain
B) Some buyers adopt a dominant strategy
C) All risk-neutral buyers adopt the equilibrium bidding strategies
D) The probability that all competitors will choose the same bidding strategy is zero
E) There are a large number of bidders with different reservation prices