问题
单项选择题
Members of the exchange who act as brokers but do not work for a specific brokerage firm are referred to as:（）
A. commission brokers.
B. registered brokers.
C. floor brokers.
答案
参考答案：C
解析：
Floor brokers are independent brokers that help other brokerage firms fill orders when they are unable to handle the volume of orders.