Demographic factors, discoveries and inventions, and _________ are three of the main ways by which social change occurs.

A) political regime changes
B) major physical events
C) war
D) disease

Demographic Factors

Characteristics of a population used in social science studies, such as age, gender, income level, education, and ethnicity.

Political Regime

The form of government or a set of rules, cultural or social norms, that regulate the operation of a government or institution and its interactions with society.