(单选题)

What has mainly helped lead to a new boom in the business?

A.Improving product quality

B.Adjusting managing strategy

C.Designing beautiful patterns

D.Advertising products widely

参考答案：B

参考解析：

细节理解题。根据第三段“It has stopped using the mass production lines that targeted big festival and has turned instead to traditional lantern arts and culture and brought in new technology and developed new products to meet diverse demands from customers all across the country”可知，它已经不再使用以大型节日为目标的大规模生产线，而是转向传统的灯艺和文化，引入新技术，开发新产品，以满足全国各地客户的多样化需求。由此可知，主要是调整经营战略促成了灯笼业的发展。故选B。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语