(Choose 1 answer)
(18672) The Bigdrill company drills for oil, which it sells for $200 million to the Bigoil company to be made into gas. The Bigoil company's gas is sold for a total of $600 million. What is the total contribution to the country's GDP from companies Bigdrill and Bigoil?
A. $800 million
B. $600 million
C. $400 million
D. $200 million
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