challenge: What is the thrust-specific fuel consumption (TSFC) of the Rolls-Royce AE 3007 engine at static sea level takeoff?
  
  A. 0.36 lb/(lbf⋅h) (10 g/(kN⋅s))
  B. 0.55 lb/(lbf⋅h) (16 g/(kN⋅s))
  C. 0.45 lb/(lbf⋅h) (13 g/(kN⋅s))
  D. 0.25 lb/(lbf⋅h) (7 g/(kN⋅s))
  Answer: 