The table provides an extract from one country's balance of payments: trade in goods exports $150bn, imports $200bn; trade in services exports $70bn, imports $50bn; primary (investment) income exports $120bn, imports $100bn; secondary (transfer) income exports $15bn, imports $20bn. What is the current account balance?
- A–$10bn
- B–$15bn
- C–$30bn
- D–$50bn