challenge: What is the southern terminus of State Road 699 located at?
  
  A. The extreme western end of SR 688 in Indian Rocks Beach
  B. The northern end of the Pinellas County barrier islands
  C. The extreme western end of Pinellas Bayway (SR 682) in St. Pete Beach
  D. The intersection of Corey Causeway (SR 693) and Gulf Boulevard
  Answer: 