The correct options are
A Contour Barrier
B Terrace Farming
C Rock Dams
Contour barrier, Terrace farming, Rock dams, and Strip cropping are methods that are used to protect soil from erosion caused by running water. Soil Erosion happens when the top layer of soil is washed away due to reasons like deforestation, overgrazing, construction and mining, or due to natural forces like wind, glacier and water.