Suppose that between Year 1 and Year 2, the nominal GDP of an economy increased from $1 billion to $3 billion, and that the appropriate index of prices increased from 100 in Year 1 to 200 in Year 2. GDP for Year 2 in terms of Year 1 prices would be

Select one:

a.$3 billion.

b.$1.5 billion.

c.$4 billion.

d.$6 billion.

e.$2 billion.