Final answer:
A cold disaster recovery (DR) pattern is most suitable for a banking company's DR plan concerning historical compliance-oriented data that does not require speedy access.
Step-by-step explanation:
For a banking company designing a disaster recovery (DR) plan for compliance-oriented data where speedy access is not a requirement, the most appropriate disaster recovery pattern to suggest would be A) Cold. A cold site is a backup site where the environment is similar to the primary operation site, but it does not have active data replication. The servers and communication equipment are in place, but they are not operational until needed.
In contrast, warm sites are partially equipped with some but not all systems active and hot sites are fully functional duplicates of the original site, ready for immediate use, both of which may not be necessary or financially justifiable for the client's needs. Live sites are active locations used for real-time services and do not align with the typical characteristics of a DR plan.