In 2006,in Response to the Issue of Illegal Immigration from Mexico,Congress

In 2006,in response to the issue of illegal immigration from Mexico,Congress authorized which of the following actions?

A) Authorized a fence along one third of the U.S.-Mexico border
B) Opened the borders and began to charge passage fees for people to enter
C) Blended the Border, Customs, and Drug operations under one federal directorate
D) Sent the Mexican president a threat to halt illegal immigration immediately