After a Hurricane Hit Halifax a Few Years Ago,local Retailers

After a hurricane hit Halifax a few years ago,local retailers increased the price of milk and gas by 50% in one day,even though all other stores in the province did not increase prices.These retailers were using

A) conflict-of-interest pricing.
B) sharp business practices.
C) crisis-based pricing.
D) price gouging.
E) it is not possible to tell from the information that is given.