The Three Firms Below Have Five Choices for Pollution Control

The three firms below have five choices for pollution control: no controls or four different technologies,W,X,Y and Z.The amount of pollution emitted and the cost of the technologies are shown in the table.
-Refer to the information above.Suppose that the government imposes a tax of $1400 per ton of pollution.As a result,Axxon picks __________,Immobil picks __________,and Cexaco picks __________.

A) Y;Z;no controls
B) Z;Z;Z
C) X;Y;W
D) W;X;X
E) X;Y;Z