The correct answer is B) tariff and trade agreements with the European Union.
The trend in the 1990s that the US business made use of was to tariff and trade agreements with the European Union.
The United States and the European Union had a very good relationship based on trade agreements that benefit both parts. According to official data from the European Commission, the United States investments in the European Union is three times higher than US investments in Asia. And in the case of EU investment in the United States, is eight times higher than the investments in India and China. So yes, the trend in the 1990s that the US business made use of was to tariff and trade agreements with the European Union.
The other options of this question were a) outsourcing the production of goods and services, c) insourcing the production of goods, and d) tariff and trade agreements with China.