Which title best completes this partial outline?

a. mass starvation in ireland( 1845-1850)
b. partition of india (1947)
c. latin america seeking jobs in the us (post- world war 2)
d. ethnic cleansing in the balkans (1990s)
answers: a-causes of industrialization b. reasons for cultural borrowing
c-causes of global migrations d- reasons for colonialism

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:

Argon, carbon-14, and carbon-12

Its led to migrationits led to death