Answer:
Modernization theory.
Explanation:
Modernization theory is a concept used to describe a nation's cycle of transformation as it moves from a traditional to a modern one. It emerged in the 1950s as an explanation of how North America and Western Europe's industrial societies evolved. It is based on the notion that technological advancement, scientific progress, technological advancement, mobility, and economic growth are vital elements of industrial societies and continuously strives by developing nations.
C. They made it easier to perform calculations.
A psychologist.
The root word they both share is psych. By adding ology on the end it will be the study of, which is the word above. To find someone who studies it, we would simply add ologist after the root word, because ologist means someone who studies.
