问题
单项选择题
The fact that firms can make more adjustments to production methods in the long run gives the firm:（）
A. the ability to quickly adjust output.
B. a long-run supply curve that is steeper than its short-run supply curve.
C. a long-run supply curve that is more elastic than its short-run supply curve.
答案
参考答案：C
解析：
Firms can adjust the fixed nature of their production costs in the long run through the purchase or sale of fixed assets. Therefore, it costs less to adjust output slowly in response to a change in demand. In the long run, there will be a greater change in the quantity supplied for a given change in price. This is because in the long run firms can change their production capacity.