Which tactic did both Chandragupta Maurya and Asoka use to gain power? O They set up a system of spies.
O They expanded the empire's borders.
O They carved edicts in pillars and rocks.
They sent missionaries to foreign lands.

They set up a system of spies.

Explanation:

post the grid otherwise i cant .

also it sounds like a math question not history.

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.