Which organization conducts an international survey of businesspeople, political analysts, and the general public on corruption and compiles the Corruption Perception Index (CPI)?
A. Organization of American States (OAS).
B. United Nations Convention against Corruption (UNCAC).
C. Organization for Economic Cooperation and Development (OECD).
D. Transparency International (TI).
E. World Trade Organization (WTO).
Answer: Transparency International (TI).