If nominal GDP was $9,200 billion in Year 1 and $9,420 billion in Year 2 and prices increased from Year 1 to Year 2, then
选项：

A:real GDP was larger in Year 1 than in Year 2
B:real GDP was larger in Year 2 than in Year 1
C:the GDP-deflator must have been 122
D:the GDP-deflator must have been 102
E:we cannot determine the value of the GDP-deflator or real GDP in Year 2