Correct Option: C

Currently, the tallest dam in the world is the Nurek Dam, an embankment dam in Tajikistan at 300 m high. The tallest arch dam is the recently completed 292 m high Xiaowan Dam in China. For gravity dams, the tallest is the 285 m high Grande Dixence Dam in Switzerland. When completed, a 335 m tall Rogun Dam also in Tajikistan could be the tallest, depending on the chosen design. Next in line is the 312 m Shuangjiangkou Dam currently under construction in China. Natural landslide dams are also quite competitive in height but not listed here. In particular, the highest natural dam, Usoi Dam, is higher than the highest existing man-made one. The Bhakra Dam is a concrete gravity dam across the Sutlej River, and is near the border between Punjab and Himachal Pradesh in northern India. The dam, at (226 m), is one of the highest gravity dams in the world (compared to USA’s largest Hoover Dam at 743 ft).