题目选项分析

Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil, their descendants, popularly known as killer bees, had migrated as far north as southern Texas.

It took less than 35 years after the time that African honeybees were released outside Sao Paulo, Brazil, and then their descendants, popularly known as killer bees, had migrated as far north as southern Texas.