Which of the following challenges faced both pachacuti and huayna capac as rulers of the inca empire? a. a disorganized social hierarchy  b. the lack of a formal written language  c. aggression from spanish conquistadores  d. the expansion of the trephination system

Correct answer choice is :

Tupac Inca and Huayna Capac, the 10th and 11th Sapa Incas, were accountable for the tremendous development of the empire. Tupac Inca, the imperial Inca accountant was put in charge of Pachacuti’s army at the tender age of 23. What he required in experience he made up for with bravery and he was accountable for spreading the empire across enormous swathes of Northern Peru and present-day Ecuador. The Inca Empire attained its peak during Huayna Capac’s reign.