题目选项分析

Native to South America, peanuts were introduced to Africa by Portuguese explorers early in the sixteenth century and were quickly adopted into Africa's agriculture, probably because they were so similar to the Bambarra groundnut, a popular indigenous plant.

Native to South America, when peanuts were introduced to Africa by Portuguese explorers early in the sixteenth century they were quickly adopted into Africa's agriculture, probably because of being so similar to the Bambarra groundnut, a popular indigenous plant.