A______division of labor has contributed most to the increase of production promoted gene
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A______division of labor has contributed most to the increase of production, promoted general welfare, and raised the standard of living in industrial countries.
A．complicated
B．complex
C．sophisticated
D．regular
请帮忙给出正确答案和分析，谢谢！
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正确答案：B
complex“复杂的"，指由许多不同部分组织起来的整体，需有较多知识才能认识掌握，如：complexprocess“复杂的工艺”，complexmind“复杂的头脑”，complexdivi—sionoflabour“复杂的劳动分工”等。complicated是complex的同义词，有难懂、解决起来费事的含义，如：complicatedproblem(idea，thought，case，mechanism)“复杂的问题(思想、想法、案件、机器结构)”。sophisticated“老练的，世故的”；regu—lar“正式的”。