Final answer:
The total value of international trade in services and merchandise is about $20 trillion, as it is a substantial part of the global economy, which produces over $80 trillion annually.The answer is B)
Step-by-step explanation:
The question relates to the total value of international trade in services and merchandise in the year 2008. Referring to the provided context about the global economy, it states that the global economy produces more than $80 trillion of goods and services each year. Given this context, the closest answer to the total value of international trade is $20 trillion, as international trade involves a substantial movement of goods and services around the globe and is a significant economic force.