Hades is the greek god of underworld. who did he place in charge of guarding the gate outside his kingdom?
charon
styx
cerberus
fleetus

According to Greek mythology, Cerberus was the dog of Hades.

It was a giant three-headed monstrous dog, with a tail serpent and had many serpent heads on its back, its mission was to protect the doors of the Greek underworld to prevent the living souls from entering without asking permission to the death and prevent the dead souls to leave the place.

c. archbishop desmond tutu promoted the acknowledgement of the rights of black africans and expose human rights abuses.

d. leader haile selassie modernized african society through the institution of progressive social, economic, and educational reforms.