I NEED HELP!! Stretching from Canada to Mexico, the are the longest mountain range in the United States. The Rio Grande, Missouri, and Mississippi are major in the United States. The United States is bordered by the to its east.

The first one would be Rockies

The second one would be Rivers

The third one would be Atlantic ocean

Explanation:

The investiture controversy began as a power struggle between pope gregory vii (1072–85) and henry iv, holy roman emperor (1056–1106).[2] a brief but significant struggle over investiture also occurred between henry i of england and pope paschal ii in the years 1103 to 1107, and the issue played a minor role in the struggles between church and state in france, as well.by undercutting the imperial power established by the salian emperors, the controversy led to nearly 50 years of civil war in germany, and the triumph of the great dukes and abbots. imperial power was finally re-established under the hohenstaufen dynasty. historian norman cantor:

Ansradar; im guessing here; good luck : )