Front Running in Futures Market Involves

Front running in futures market involves:

A) a floor broker who executes customer orders acting as a dealer in some other transactions on the same day
B) trading based on an impending transaction by another person,for example,a floor trader buying on his own account in front of his customer's buy order
C) taking a customer's order and placing it ahead of accumulated limit orders
D) placing orders during the first few minutes of a trading day
E) None of these answers are correct.