What material makes up earth's outer core?

a. peridotite
b. a liquid iron-nickel alloy
c. a solid iron-nickel alloy
d. basalt

The material that makes up earths outer core is solid iron and nickel
source: wonderopolis.com
hope this helps :]

C. the innercore however is liquid due to pressure and temperature.
some crust however may have basalt or granite.

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:

The study of where things are