Final answer:
The words "Sensitive," "Proprietary," and "Public" at the top and bottom of Triffid, Inc. documents are classification labels used to dictate the level of confidentiality and audience for the document.
Step-by-step explanation:
The words "Sensitive," "Proprietary," and "Public" that appear at the top and bottom of Triffid, Inc. documents represent classification labels. These labels are used to indicate the level of confidentiality and the intended audience for the document. The function of these labels is to ensure that sensitive information is handled properly and only shared with authorized individuals.
Considering the context where a company is determining the sensitivity and distribution level of its documents, options such as encryption keys and watermarks, while related to document security, do not align with the description of large, clearly visible words intended to classify the content. Document headers could be a close choice but traditionally do not have the specific purpose of classifying the document's distribution or sensitivity level; instead, they generally contain information like the title, author, or page numbers. Therefore, classification labels most accurately describe the purpose of these prominently displayed words.