Catalytic hydroprocessing can _________.
A.
remove non-hydrocarbon impurities such as sulphur, nitrogen and metal in order to give acceptable quality for finished products
B.
ncrease the octane number of light crude fractions having high paraffin and naphthene contents by converting them to aromatics
C.
distill crude oil into fractions
D.
convert heavy, low-value oils into lighter, high-value products