Which of these sources is most likely to yield scientific evidence about an economic theory?

1. A Option A: A radio talk show host collecting data from listeners on how capital markets respond to taxation
2. B Option B: A lawyer employed by Renault addressing the impact of air bags on passenger safety
3. C Option C: An economist employed by the Trades Union Congress doing research on the impact of trade policy on workers' wages
4. D Option D: An economist permanently employed at a leading university analysing the impact of bank regulations on lending to small businesses

Answer checked 11 October 2026 · How we write and check questions