A GDP Price Index of 100 for a Year Implies

A GDP price index of 100 for a year implies that:

A) there has been no inflation during the year.
B) the price level is three times what it was in the base year.
C) the price level is one hundred times what it was in the base year.
D) the price level is double what it was in the base year.
E) the inflation rate has been 100 percent per year since the base year.