What factor allowed the incas to use their military efficiently? they developed an extensive system of paved stone roads. they created a unique record-keeping system for military campaigns. they adopted spanish military technology and used it against their enemies. they used rivers to transport their troops

The Inca war machine took great advantage from the development of an extensive system of paved stone roads and communication system they had as well as strategically storehouse’s locations.  

The answer is

A- They developed an extensive system of paved stone roads.

answer is 1935

because gandhi led a march the sea in 1930 and 5 years later he did it again

"the attempts of the proletariat to rise above this abasement"