How Did the Last Ice Age Affect Paleolithic People

How did the last Ice Age affect Paleolithic people?

A) Ice served as an important preservative for food,making it possible for them to settle in the same place for extended periods.
B) The cold weather killed off most large mammals that had preyed on early human beings.
C) As the glaciers advanced,humans could easily move into new regions because humankind had originated in cold climates.
D) The lower sea levels associated with the Ice Age created land bridges,allowing human beings to travel to many regions of the earth.