What Does It Mean If the GDP Deflator Is 100

Multiple Choice

What does it mean if the GDP deflator is 100 this year?  

A)  No inflation occurred during this year. 
B)  This year's price level is the same as it was in the base year. 
C)  This year's price level is one hundred times what it was in the base year. 
D)  This year's price level is double what it was in the base year.