Answer:
The correct option is: B) in
Step-by-step explanation:
The metric system, also called the International System of Units, is an international system of measurement.
The units for length measurement used in the International System of Units are: kilometre (km), metre (m), centimetre (cm), millimetre (mm), nanometre (nm).
Whereas, the Imperial units and U.S. customary units of length include inch (in), which is equal to 25.4 mm.