A petroleum and oil products are the most significant energy sources in Brazil, followed by sugar-cane ethanol and hydroelectric power.
B petroleum and oil products must be the top priority of the Brazilian government.
C ethanol derived from sugar-cane has surpassed all other forms of power generation in Brazil.
D hydroelectric plants have always been the most efficient source of energyin Brazil.
E hydroelectric plants and cane-based ethanol are, nowadays, the most productive sources of energy in Brazil.