What body of water was formed as a result of the building of the Glen Canyon Dam? A. Lake Powell B. Colorado River C. Lake Mead D. Glen Canyon Lake

Formed by the waters of the Colorado River behind Glen Canyon Dam, Lake Powell's 1,960 miles of winding shoreline (when full) and 186 mile-length make it the second-largest reservoir in the United States. Lake Mead, formed by Hoover Dam is the largest the correct answer is A

The building of the Glen Canyon Dam formed A, Lake Powell, which happens to be the second largest reservoir in the United States, second only to Lake Mead, which was formed by the Hoover Dam.