If the supply curve for news magazines is an upward-sloping line and goes through the point (quantity supplied=0, price=$1.00), then the price elasticty of supply for news magazines is
  A. less than one
  B. greater than one
  C. perfectly inelastic
  D. equal to the price elasticity of demand for news magazines.

答案是选择B，请解释理由。万分感谢！~~