Which of the following resources was NOT part of international trade 2000 years ago?

Question

Quizplus · Accepted Answer

Petroleum did not become a significant part of international trade until the 19th century with the advent of the industrial revolution and the development of the internal combustion engine. 2000 years ago, the primary resources traded internationally included precious metals like gold and silver, kaolinite clay for pottery and porcelain, and amber for jewelry and decoration.

Which of the Following Resources Was NOT Part of International