The expansion and stability of the inca empire was aided by
a) the widespread use of horses for quick communication.
b) the aztec policy of swift punishment to stop rebellions.
c) an extensive network of roads that linked its territories.
d) its alliance with the spanish conquistador francisco pizarro.

C) an extensive network of roads that linked its territories.

The Inca Empire was the largest empire of South America and one of the most advanced in pre-Columbian America. The centre of the empire was located in Cusco, modern Peru. The empire was conquered in its totality by 1572. One of the main factors that contributed to its success was its extensive network of roads.

Incas (or any other American people) did not have horses, which only arrived with the European conquistadores. Moreover, they did not have any contact with the Aztec people of central Mexico. Finally, the Incan empire faced its decline with the arrival of Francisco Pizarro.

some women in the middle and upper classes worked as doctors, government officials, or priestesses. both women and men enjoyed a better quality of life the higher they were on the social pyramid. the egyptians believed that their class system created a stable, well-ordered society. each group had its own role to play.

the outcome of 1970 oil crisis in united states was that, they began to search ways on how to reduce oil.

in 1970 was a period when there were energy and oil crisis. those who were major centers for industrialization were forced to keep way from supplying of petroleum.

some of the result of this crisis was economic growth became stagnant because prices of oil surged.

due to the increased prices some countries like mexico and norway benefited.