Which of the following descriptions characterizes a confederate system of government? A.
A system that grants unlimited powers to a central government
B.
A system based on the belief that a strong central government best serves the needs of the people
C.
A system where local governments control the powers of the central government
D.
A system where a central government and local governments work together with equal power and control

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:

I'm pretty sure it's c. extremely gradual but not 100% sure though.