The U.S. Border Patrol engages in a practice known as "linewatch" where agents
O a. prioritize particular parts of the border for enforcement activites.
Ob, monitor the border using binoculars and other types of technology to guard against the smuggling of narcotics and illegal
immigration.
O c. carefully monitor those who have been apprehended illegally crossing the border until they can be transferred to the
custody of Immigration and Customs Enforcement.
O d. inspect vehicles entering the United States via land crossings.