A. River Mississippi
B. River Colorado
C. River Amazon
D. None of these
The Hoover Dam is constructed on the River Colorado. It is the biggest Dam in the USA. Hoover Dam is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the U.S. states of Nevada and Arizona. Hoover Dam was built between 1931 to 1936. It was the time of the great depression. Mr. Franklin D. Roosevelt was the President of the USA at that time.
See these other GK Questions.