Answer:
The correct answer is letter "C": Brokers buy and sell securities from their own inventory, while dealers bring buyers and sellers together to complete transactions.
Step-by-step explanation:
In a dealer market, participants buy and sell through dealers designated as market makers. These are electronic networks were market makers or brokers keep inventories from which they buy and sell stocks to customers or other dealers. They provide liquidity as well as transparency by displaying the price at which they will buy a security.