The correct options are
A Rivers
C Glaciers
D Wind
Some agents of gradation that can erode mountains are rivers, glaciers, and wind. Rivers form gorges, canyons and V-shaped valleys. Glaciers are responsible for the making of erosional landforms such as U-shaped valleys, cirques, aretes, horns, hanging valleys, and fjords. Erosional landforms created by wind are mushroom rocks, inselberg, yardang, and deflation hollows.