gram (g) milliliter (mL) centimeter (cm) degree Celsius (°C)
I gave my students this multiple choice question: Which metric unit is used to describe an object's length?

Only one answer is correct among these 4 choices:
- gram (g)
- milliliter (mL)
- centimeter (cm)
- degree Celsius (°C)

Could you tell me which one is correct?

centimeter (cm)