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The metric system is a measurement system that is: only used by a few of the nations of the world. used exclusively in chemical calculations. commonly used by U.S. physical scientists. the official system for all nations of the world.

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Answer:

The metric system is the official system for all nations of the world.

Explanation:

To make measures, it is necessary to have a set of standardized magnitudes to compare things we want to measure. This set of standardized magnitudes is called a unit system.

The metric system is a decimalized system of measurement which has meters and grams as a basic measurement unit. The metric system is the most used in the world, and also, is the official system for all nations of the world.