Which of the following is the value of a country's external wealth at the end of 2009 if its external wealth was -$1 billion at the end of 2008 and its trade balance was $600 million in 2009? Assume the world interest rate is 5% per annum. A) -$1.55 billion B) -$1.65 billion C) -$0.55 billion D) -$0.45 billion