Answer:
D. I, II, and III.
Explanation:
All the three factors cause social change: invention, demography and diffusion.
An invention is some creation that can change the social organization, the process of production or economic relations, like the invention of the steam engine or the application of electricity in the city. The steam engine accelerated textile production and increased factories and the demand of workforce for it, causing a lot of social change.
Demography is about the quantity of population, it considers the number of birth, death and the process of migration. A quick grow in demography will require more food, schools, work, homes and will cause social change, while a decrease in demography will also cause social change but in the opposite direction, will have less demand of it all.
Diffusion is the when one culture appropriates things from another culture, merging itself with it. The inclusion of customs, values and traditions of other culture can cause social changes, for example how Buddhism diffused from India in China or Christianism in indigenous tribe, this caused social changes in practices and values.
