Why is bartering not used globally on a large scale to meet the needs of people and populations?

Bartering means trading goods or services directly, without money. For it to work on a large scale, people would need a consistent way to compare the value of very different things, such as food and repairs. That makes A, the need to standardize the value of goods and services, the best answer. Bartering is not limited to crises, and coins and paper money are not required for barter.

AI-written and checked against the verified answer.