What Environmental Change Is Believed to Have Led to a Radical

What environmental change is believed to have led to a radical change in the nomadic Paleolithic way of life?

A) The climate in certain Near East regions became milder and wetter, resulting in increased fertility of the land.
B) The swamps along the Mediterranean coast dried up, and land became available for cultivation.
C) There was less precipitation, and floods-which had regularly devastated prime growing areas-ceased.
D) The glaciers of the last Ice Age advanced, cutting back the land available for cultivation.