Answer: d.
Explanation: they used them to spy on each other
D.
the deliberate modification of Earth’s surface through cultivation of plants and rearing of animals
Answer:self interest is based on what you believe is good to do, while selfishness is only caring about personal gain
Explanation:
Chandragupta Maurya founded the Empire in 322 B.C.E. after overthrowing the Nanda Dynasty. He began rapidly expanding his power westward across central and western India. ... the empire had fully occupied Northwestern India, defeating and conquering the satraps left by Alexander.