We all observe old wells which have dried up. Our elders say that about 25-30 years ago there was sufficient water in the wells, but now these have completely dried up. Select from the following the possible correct reasons for drying up of water in the wells. A. The lakes (ponds) in which rain water used to collect are no longer there. B. The soil around the trees, well and nearby area is now covered with coaltar/cement. C. No one uses wells as there are taps in every house. D. A number of electric motor driven pumps have come up to draw underground water.