Final answer:
The element not necessary to prove medical negligence is Standard of Care. It is a benchmark to establish Breach of Duty rather than a standalone element of proof in medical negligence cases.
Step-by-step explanation:
To answer your question, the element that is NOT necessary to prove medical negligence among the options provided is D) Standard of Care. To constitute a claim of medical negligence, specific elements must be present. These include A) Duty: the legal obligation of care, B) Breach of Duty: failure to meet the standard of care, and C) Proximate Cause: showing that the breach of duty directly caused the injury. While 'Standard of Care' is related and significant, it's not an element to be proven but rather a benchmark against which duty, breach, and causation are measured. Therefore, it is a fundamental part of establishing 'Breach of Duty', but it is not a standalone element in the proof of medical negligence.