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 CI.EANING WATER FROM FUEL OIL TANKS R EFERRED TO UNDER SECTION (A)
C.
item C/DISPOSAL OF OIL RESIDUES (SLUDGE)
D.
item H/BUNKERING OF FUEL OILS