Final answer:
Option (C), The subject of this question is Law in the context of legal documents. The correct answer is Erasable document.
Step-by-step explanation:
The subject of this question is Law in the context of legal documents. The characteristics of a legal document include its enforceability, validity, and ability to serve as evidence in a court of law. Based on the given information, the correct answer is C) Erasable document. Pencils can be erased or smudged, which means that the document can be altered or modified.