The material wealth of a society is equal to the sum of _________.

The correct answer is C. all financial and real assets.

Financial assets are assets that have monetary value and can be bought and sold. They include things like stocks, bonds, and money. Real assets are assets that have physical value, such as land, buildings, and machinery.

The material wealth of a society is the total value of all the goods and services that are produced in that society. It includes both financial and real assets.

Option A is incorrect because it only includes financial assets. Option B is incorrect because it only includes real assets. Option D is incorrect because it only includes physical assets.