challenge: What was the primary purpose of the USAAF taking control of Hillsgrove State Airport in Warwick, Rhode Island during World War II?
  
  A. To function as a base for USAAF transport planes
  B. To train pilots and aircrews of USAAF fighters and bombers
  C. To serve as a logistics hub for the US Navy
  D. To provide air support for the US Marine Corps
  Answer: 