A useful classification of historical documents is

Question

Quizplus · Accepted Answer

All the options provided represent useful ways to classify historical documents. Primary vs. secondary refers to the directness of the source's connection to the event or subject it describes. Published vs. unpublished distinguishes between documents that have been made available to the public and those that have not. Intentional vs. unpremeditated differentiates between documents created with the purpose of being a record and those that become useful historical documents by chance.

A Useful Classification of Historical Documents Is