Final answer:
Illegible medical documentation is not helpful and can cause legal problems, as it may lead to misunderstandings and medical errors, and cannot serve as clear evidence in legal situations.
Step-by-step explanation:
Medical documentation that is illegibly written is b) Useless and may cause legal problems. Legible documentation is crucial for the continuity of patient care and for legal purposes. Illegible handwriting can lead to mistakes in patient treatment, issues with medication dosages, and misunderstandings among healthcare professionals, potentially resulting in medical errors or negligence. From a legal standpoint, clear and legible records are essential for defending medical decisions in court, as they provide evidence of the care provided. Therefore, illegible medical records are not advisable as they can undermine patient safety and lead to serious legal consequences.