V Spent the Weekend with D Whom She Had Just

V spent the weekend with D whom she had just met, during which she took an overdose of tablets. D arranged for her to be taken to another flat where she died. D's liability is that of:

A) Nothing, because V was not his blood relative and therefore D had no legal duty towards her.
B) Nothing, because V was not part of D's household and therefore D had no duty towards her.
C) Gross negligence manslaughter because D had been grossly negligent.
D) Gross negligence manslaughter if D was under a duty of care by assumption of responsibility.