Twenty Years Ago a Stove Cost $300 and a Refrigerator

Twenty years ago a stove cost $300 and a refrigerator cost $1,500.Today a stove costs $600,while a refrigerator costs $1,800.Which of the following statements is true?

A) The relative price of stoves and refrigerators has not changed.
B) The relative price of a refrigerator has increased.
C) The relative price of a stove has increased.
D) The money price of a refrigerator has fallen.