When Large Firms in Oligopolies Cut Their Prices

When large firms in oligopolies cut their prices,

A) rival firms will also cut their prices to avoid losing sales.
B) rival firms will not change their prices because most of their customers have signed contracts that commit them to doing business with the same firms for the life of their contracts.
C) we don't know for sure how rival firms will respond.
D) rival firms will not cut their prices because they fear that the federal government will accuse them of collusion.