Final answer:
Financial services are a significant contributor to the service exports of the United States, representing a large part of the GDP and a key player in the global services trade sector. Hence, the correct answer is option B.
Step-by-step explanation:
Among the industries that have a significant share in the service exports of the United States, apart from international tourism and transportation, financial services stand out as a major contributor. Financial services encompass various segments like banking, insurance, investment, and real estate services.
The growth in the global services trade sector indicates that these services are increasingly contributing to the US gross domestic product (GDP) and are prominent in international trade. In fact, the service sector represents the largest part of the US GDP, with services becoming a growing share of GDP over time. While traditional industries like manufacturing and agriculture are vital to the economy, the financial services industry is a key player in the service export market, providing international investors with potential returns and establishing a cornerstone in US service exports.