3.2

If you paste the actual C1 question (even a photo description), I can craft a precise, original answer for you.

: A common C1-level worksheet series found on academic platforms like

If the interactive exercise asks for a calculation (e.g., population density), ensure you distinguish between km² and miles².

Interactive workbooks are designed to be more than digital textbooks. They track your logic. To ensure your "C1" answers are marked correct: