Step 1: Analyze the core function described. The sentence states that a type of accounting "helps management as a control measure" and is useful in "business development". This points to an internal focus, providing information directly to managers for operational decisions and oversight. Step 2: Evaluate each option. a. Cost accounting: This branch focuses on recording, analyzing, and reporting the costs associated with products, services, or processes. It is indeed useful for cost control*, which is a type of management control. b. Financial accounting*: This focuses on preparing financial statements for external users (investors, creditors, regulators). While important for business, its primary purpose is not internal management control. c. Management accounting: This branch provides financial and non-financial information to managers for planning, decision-making, and control*. It encompasses budgeting, performance evaluation, variance analysis, and other tools that directly serve as control measures for management. Cost accounting is a significant component of management accounting. d. Taxation accounting*: This deals with preparing tax returns and planning for tax obligations. Its primary role is compliance with tax laws, not internal management control. Step 3: Determine the best fit. While cost accounting is a vital part of control, management accounting is the broader discipline specifically designed to provide information and tools for managers to plan, make decisions, and control business operations. It directly addresses the need for "management as a control measure" in the context of "business development". The final answer is $\boxed{\text{c}}$.