What Does Gross Domestic Product Measure

What does gross domestic product measure?  

A)  the market value of all final goods and services produced by a nation's citizens, residents, and firms regardless of the location of production 
B)  the market value of all final goods and services produced by resources located within a nation regardless of who owns those resources 
C)  the market value of all goods and services produced by resources located within a nation regardless of who owns those resources 
D)  the market value of all goods and services produced by a nation's citizens, residents and firms regardless of the location of production