The answer is b. Modern and diversified. Brazil's economy is not only based on agriculture anymore, although is one of the most succesful part of the economy. The Brazilian agriculture today is not only coffee and sugarcane. Brazil is also the first worldwide productor of orange, sugar and coffee. Export bovine and chicken meat and its derivatives. Still is a good producer of sugarcane and it's fuel, the ethanol.
There is also commerce of several goods, products and services besides automotive and oil industry among others.