문제 내용: 주어진 문장이 들어갈 위치로 알맞은 것은?
  They installed video cameras at places known for illegal crossings, and put live video feeds from the cameras on a Web site.
  Immigration reform is a political minefield. (1) About the only aspect of immigration policy that commands broad political support is the resolve to secure the U.S. border with Mexico to limit the flow of illegal immigrants. (2) Texas sheriffs recently developed a novel use of the Internet to help them keep watch on the border. ( ③) Citizens who want to help monitor the border can go online and serve as "virtual Texas deputies." ( 4 ) If they see anyone trying to cross the border, they send a report to the sheriff's office, which follows up, sometimes with the help of the U.S. Border Patrol.
선택지 1: (1)
선택지 2: (2)
선택지 3: (3)
선택지 4: (4)