Which of the Following Statements About Government Corruption in Brazil

Which of the following statements about government corruption in Brazil is accurate?

A) The electoral system forces high accountability for individual legislators, which pushes corruption into the executive.
B) President da Silva's administration has been the only one in recent decades to escape corruption allegations.
C) President Rousseff's hard stance against corruption has been undermined by numerous corruption allegations against members of her cabinet.
D) President Fernando Collor de Mello was ultimately impeached due to corruption charges.
E) Most scholars blame Brazil's high levels of natural resources for the presence of persistent government corruption.