It uses a decimal system of measurement, this feature makes the metric system easy to use, therefore the correct answer is option B
A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation. Any additional quantity of that type can be stated as a multiple of the measurement unit.
The metric system is easy to use because it uses a decimal system of measurement.
Thus, The metric system is simple to use because it employs a decimal system of measurement, so option B is the appropriate response.
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