问题
单项选择题
Which of the following is the most likely result of a technological improvement in a perfectly competitive industry（）
A. Individual firms’ supply curves shift to the left.
B. The industry supply curve shifts to the right.
C. The costs for individual firms increase.
答案
参考答案：B
解析：
When individual firms implement technological change, their costs decline and their supply (cost) curve shifts to the right. At the lower costs, firms are willing to supply a given quantity at a reduced price. The lower cost structure for the individual firms shifts the industry supply curve to the right.