The full question is:
Which of the following statements are true about measurements and units?
A. The SI Unit is used by scientists all over the world.
B. The unit of mass in the SI system is the kilogram.
C. Measurements do not need to include units.
D. The English system of measurements is based off of the powers of ten.
The correct answer is A. The SI Unit is used by scientists all over the world. The International System of Units is the metric system which consists of units of measurement. There are 7 main units: ampere, Kelvin, second, meter, kilogram, candela, mole and 22 derived units.