Water from the amu dar'ya runs to the
a) aral sea
b) black sea
c) caspian sea
d) mediterranian sea
 hurry

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.

when in doubt choose c

it's what my teacher told my class when we were going into psats