The letter answer is D.
Medical records can be considered as demonstrative evidences. They are tangible in nature and can be serve as representations or evidence testimonies used in trials. This type of evidence is useful in finding the facts in a case and establishing a concrete context among the facts that were presented. They are commonly used as a personal injury lawyer resource and can give a dramatic impact in the court of law. They also tend to maximize the value of the case because of its concise nature.