challenge: Why did Soranik Natu and the rest of her people view the Green Lanterns as a symbol of oppression?
  
  A. Because the first Korugaran to become a Green Lantern, Sinestro, used his power ring to enslave his people
  B. Because the Green Lanterns had previously invaded Korugar
  C. Because the first Korugaran Green Lantern, Katma Tui, used her power ring for evil purposes
  D. Because the Guardians of the Universe had imposed harsh rules on Korugar
  Answer: 