What types of matters are typically non-disclosable in the context of disclosure?

In the context of disclosure, privileged matters and documents prepared for litigation are considered non-disclosable due to the protection provided by legal privileges. This includes communications between a lawyer and their client, as well as documents that are created specifically in anticipation of litigation. These protections are designed to encourage open and honest communication between clients and legal counsel without the fear that these communications will be disclosed to opposing parties.

The other choices do not fall under the same protection. General correspondence between parties may not be privileged and can often be subject to discovery. Similarly, any file maintained by an attorney is not automatically shielded unless it contains privileged information. Discovery requests are typically part of the process and are made openly, thus they cannot be classified as non-disclosable. The emphasis on privilege and the specific context of litigation distinguishes why option A is the correct answer in understanding matters that are non-disclosable in civil procedure.