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

Icebergs

Large pieces of freshwater ice that have broken off from a glacier or ice shelf and float in open water.

Glacier

A large, slow-moving mass of ice, formed from compacted snow and slowly flows over land.

Ice

Frozen water, existing in various forms in nature, including snow, glacial ice, and sea ice, playing a critical role in Earth's climate system.