The correct options are
C Glaciers carry sand, stones and several other sediments when they move.
D Sometimes, glaciers deposit ice in depressions, which can later form glacial lakes.
Rivers of ice are called as glaciers. Loose rocks on the bottom or at the sides of valleys are plucked from their places as glaciers move through these valleys. The glaciers carry rocks and sediments along with them. Glaciers can also deposit some of the ice in depressions as they move. As the ice in these depressions melt in the summers, it leads to the formation of glacial lakes.