Final answer:
Managerial accounting has its primary emphasis on the future and focuses on the organization as a whole. It helps managers make informed decisions by providing information about the organization's segments.
Step-by-step explanation:
The correct answer to the question is D. Responses a, b, and c are all correct. Managerial accounting has its primary emphasis on the future and involves planning, decision-making, and performance evaluation for an organization's internal use. It helps managers make informed decisions by providing information about the organization as a whole as well as its segments.