单选题 The short-run supply curve for a purely competitive market:
  • A. slopes upward to the right.
  • B. slopes downward to the right.
  • 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.