A "Call Market" Is One Where

A "call market" is one where:

A) the buyer bids and seller asks are aggregated in order to create the underlying demand and supply curves respectively; all trade takes place at the equilibrium price dictated by the underlying demand and supply curves.
B) Buyers submit bids and sellers submit asks; individual buyers and sellers are free to engage in decentralized trading in order to find profitable trades.
C) Any bid that is lower than the current lowest bid or any ask that is higher than the current highest ask is placed in a rank queue behind the current low bid and the current high ask respectively.
D) Asks must be ascending; they start low and go up; bids must be descending; they start high and go down.