My preferred way to divide complex numbers is to multiply numerator and denominator by the complex conjugate of the denominator
1. (D) Atlantic Lowlands (Most of the Brazilians live in this part because the climate is more bearable and most of the economy of the country is based in this part)
2. (C) Semiarid (In this climate type in Brazil there's long periods of drought as well as warm winds that manage to increase the temperature more then any other part of the country)
3. (A) Sugarcane (The sugarcane is something that Brazil has in abundance, so it's no wander that it is the dominant ingredient for making ethanol)
4. (B) Emperor Pedro I (Even though Portuguese born, he is the founder of the Brazilian state and it's first leader)
