The correct answer is D, Implement an automated control to prevent deployment if the developer is also trying to deploy the change.
In this scenario, the IS auditor has identified a segregation of duties concern, which is a principle that is intended to ensure that no single individual has complete control over a process or system. By having both production and developer access, the DevOps team may be able to both develop and deploy changes to the organization's systems, potentially leading to conflicts of interest or the potential for fraud or abuse. To address this concern, the auditor's best recommendation would be to implement an automated control that prevents deployment if the developer is also trying to deploy the change. This would ensure that there is a separation between the development and deployment of changes, and it would help to reduce the risk of potential conflicts of interest or abuse.