challenge: What was the original plan for the Halkapınar—Otogar Line in İzmir Metro, proposed in 2005?
  
  A. To connect the İzmir Bus Terminal to the İzmir Adnan Menderes Airport
  B. To diverge from the M1 Line at Halkapınar and run underneath Kamil Tunca Boulevard to the İzmir Bus Terminal
  C. To extend the M1 Line from Halkapınar to the city center
  D. To diverge from the M2 Line at Alsancak and run to the İzmir Port
  Answer: 