Which of the Following Correctly Describes Hernán Cortés's Efforts to Conquer

Which of the following correctly describes Hernán Cortés's efforts to conquer Mexico?

A) Cortés attempted to form alliances with Indians but was unsuccessful.
B) Cortés was unimpressed by Aztec civilization and their capital.
C) Cortés and his men had technological advantages such as steel swords.
D) The fighting lasted approximately a month.
E) Cortés's greatest obstacle was the strong unity of the Native Americans.