An Important Difference Between the GDP Deflator and the CPI

An important difference between the GDP deflator and the CPI is that:

A) the GDP deflator reflects the prices of all goods and services produced domestically, whereas the CPI reflects the prices of goods and services bought by consumers
B) the GDP deflator reflects the prices of goods and services bought by producers, whereas the CPI reflects the prices of goods and services bought by consumers
C) the GDP deflator reflects the prices of all goods and services produced by a nation's resources, whereas the CPI reflects the prices of goods and services bought by consumers
D) the GDP deflator reflects the prices of goods and services bought by producers and consumers, whereas the CPI reflects the prices of goods and services bought by consumers