80) so) in markets, participants post bid and ask prices at which they are willing to trade, but orders are not automatically executed by computer. _execute trades for people other than themselves and in _markets a computer matches orders with an existing limit order book and executes the trades automatically. A) electronie; Dealers: brokers B) direct search; Brokers, electronic C) dealer; Brokers, electronic D) brokered; Dealers; direct search