单选题 The short-run supply curve for a purely competitive market:

A、

A. slopes upward to the right.
B、

B. slopes downward to the right.
C、

C. is a horizontal line.

【正确答案】 A

【答案解析】The short-run supply curve for a purely competitive market slopes upward to the right. This reflects the fact that firms in the industry will produce more when the price rises.