Final answer:
In business, the recommended number of years to keep treatment records from the last treatment is often 10 years.
Step-by-step explanation:
In business, the retention of records is important for various reasons such as legal compliance, operational management, and financial reporting. The length of time records must be kept can vary depending on the type of record and the jurisdiction. For example, in the case of treatment records, it is generally recommended to keep them for a certain number of years to ensure compliance with healthcare regulations and to have a historical record of the patient's treatment.
Based on the options provided, it seems that the question is asking for the recommended number of years to keep records from the last treatment. Although the specific context is not mentioned, if we assume it pertains to healthcare, the answer is typically 10 years. This is because healthcare regulations in many jurisdictions, including the United States, often require healthcare providers to retain medical records for at least 10 years.