What is a major advantage in using the metric system? Question content area bottom Part 1 Choose the correct answer below. A. The metric system uses kilometers as the basic measurement. B. The metric system gives its answers as mixed numbers with fractions. C. The metric system uses powers of 2 to define units, so the arithmetic to change units is relatively simple. D. The metric system uses powers of 10 to define units, so the arithmetic to change from one unit to another is relatively simple