Donelle measures the mass of 10 pennies and records her measurements in kilograms. She wants to determine the mean mass of her pennies. What should Donelle do to make it easier to calculate the mean mass of her pennies?

ARound her measure values to the nearest tenth

BConvert the units of her measured values to milligrams

CConvert the units of her measured values to grams

DUse a computer to perform the mean calculation