What Happens When a Glacier Encounters the Sea or a Lake

Multiple Choice

What happens when a glacier encounters the sea or a lake?

A) the ice is more dense than water and so scrapes along the bottom
B) white icebergs float but blue icebergs sink to the bottom
C) large blocks of ice collapse off the front of the glacier and become icebergs
D) rocks released from melted icebergs float on the water surface
E) all of these