The core item in the Oil Record Book part I is ______ , and its main content is _____.
A.
Item A, BALLAST OR CLEANING OF FUEL OIL TANKS
B.
Item B, DISCHARGE OF DIRTY BALLAST OR CLEANING WATER FROM FUEL OIL TANKS REFFERRED TO UNDER SECTION(A)
C.
Item C, DISPOSAL OF OIL RESIDUES (SLUDGE)
D.
Item H, BUNKERING OF FUEL OIL