According to CMMI, processes can be performed in what manner?

The correct answer emphasizes the flexibility inherent in process execution as per CMMI guidelines. In CMMI, processes can be performed iteratively, in parallel, or in any beneficial order. This approach acknowledges that different projects and teams may require varying methodologies to optimize outcomes and adapt to specific contexts.

The iterative approach allows teams to refine their processes through repeated cycles, leading to continuous improvement and better adaptation to changes and feedback. Performing processes in parallel maximizes efficiency, as tasks that do not depend on each other can be accomplished simultaneously. Additionally, performing tasks in any beneficial order supports a customized workflow that can be tailored to the team's strengths and the project requirements, enhancing productivity and responsiveness.

This flexibility contrasts sharply with the other options, which suggest a rigid adherence to sequential or linear execution of processes. Such limitations could hinder responsiveness to change and the ability to leverage opportunities for improvement or efficiency gains within a project context.