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How did glaciers contribute to the formation of hills around the Lake
Michigan basin?
OA. As the glaciers retreated, they left rocks and boulders behind.
OB. As the glaciers expanded, they eroded the surrounding soil.
C. As the glaciers cooled the top layer of Earth, they set off
volcanoes.
OD. As the glaciers pressed down on the lake bed, they forced other
land to rise.