Final answer:
Today's management accountants need to be proficient in decision analysis, strategic thinking, and cost management, encompassing all the mentioned skills to perform effectively. The correct option is D.
Step-by-step explanation:
Management accountants today require a variety of skills to excel in their duties. Among those skills needed by today's management accountants are:
- Decision analysis: The ability to analyze financial data to support business decisions.
- Strategic thinking: Planning for the long term and understanding the broader business context.
- Cost management: Overseeing and managing costs efficiently within a business.
- All of the above: Management accountants must integrate all these skills to be effective in their roles.