wake2000

A call market is least likely characterized as a market?
A. With bid-ask prices posted by dealer.
B. Where buy-sell orders are cleared at a single equilibrium price.
C. With participation by a small number of active investors-traders.
(B, In a call market traders/ investors indicate their bids and asks for stocks and they are not posted by dealer. Also, a call market is not a dealer or quote-driven market ,MOCK 70-82)

这两个题怎么好像矛盾呢，有谁能给解释一下么，不胜感激