What Is the Primary Reason for the Shrinking of the Aral

What is the primary reason for the shrinking of the Aral Sea?

A) There is climatic change in Central Asia.
B) The Chinese purchase of the Aral Sea as an aquifer has led to a dramatic drop in its water level.
C) Much of the water has been removed directly from the sea surface by the numerous nuclear desalinization plants along the Aral's shore.
D) Tectonic rifting in the region is causing the sea's water to be removed beneath the ground surface.
E) Large-scale irrigation projects implemented by the Soviets in the 1950s have diverted water from the two rivers that feed the sea.