原题
录音 1
Why does the speaker discuss the labor involved in traditional indigo dye extraction?
ATo explain why indigo processing can be interesting for tourists
BTo support the claim that indigo is good for traditional economies
CTo challenge the claim that some producers use harsh chemicals
DTo introduce one problem with using natural indigo
正确答案：D
解题思路
老师暂未填写解题思路。