At 0845，you are approaching the entrances to Thimble Shoal Channel. What channel must you use?（）

A.The South Auxiliary Channel since your draft is less than 25 feet (7.6 meters)，and you are not a passenger vessel
B.The South Auxiliary Channel or Thimble Shoal Channel，but you must remain on the right hand side of the main channel
C.The North Auxiliary Channel since you are going to turn to a northerly heading near buoy "12"
D.You are not permitted to use any of the channels，but must remain outside the buoyed channel line