Answer:
Trade and investments closely connected the economy of the United States with that of the European Union
Step-by-step explanation:
In Globalization era, it become extremely easy for people from one country to invest their capital to businesses that operated from another country.
Which means that if one of the country experienced a financial crisis, it could also could negatively affected the other country who happens to invest a lot of capital.
European union and United States are heavily involved in such economic relationship. For example, in least year alone (2018) United states and European union has approximately around $800 Billion worth of investment between one another.