What Is the Test for Gross Negligence Manslaughter as Expressed

What is the test for gross negligence manslaughter as expressed by Lord Mackay in Adomako (1995) ?

A) Whether the negligence of the accused showed such disregard for the life and safety of others as to amount to a crime against the State and conduct deserving punishment
B) Whether, having regard to the risk of death involved, the conduct of the defendant was so bad in all the circumstances as to amount to a criminal act or omission
C) Whether the defendant foresaw death or serious harm as highly probable
D) Whether the defendant's conduct fell below the standard to be expected of a reasonable person