Which of the following can be inferred from the passage about cotton production in the United States

* Hướng dẫn giải

Chọn D

THông tin: “It became the main American export, dwarfing all others. In 1802, cotton composed 14 percent of total American exports by value. Cotton had a 36 percent share by 1810 and over a 50 percent share in 1830. In 1860, 61 percent of the value of American exports was represented by cotton.”