challenge: What is a proposed plan to improve access to Penn Station?
  
  A. Expanding the existing subway lines in Manhattan to accommodate more passengers
  B. Reactivating the abandoned Port Morris Branch in the South Bronx to connect the Harlem Line to the Hell Gate Line
  C. Reactivating the abandoned Port Morris Branch in the South Bronx to connect the Harlem Line to the Hudson Line
  D. Building a new subway line directly to Penn Station from the South Bronx
  Answer: 