Which of the following is the SI unit for measuring volume?

• A. cubic meter (m^3)
• B. gallon (gal)
• C. liter (L)
• D. milliliter (mL)

Answer: (A)

Verified step by step guidance

1. Understand that the SI (International System of Units) unit for volume is derived from the SI base unit for length, which is the meter (m).
2. Recall that volume is a measure of three-dimensional space, so its unit is expressed as a cube of length units, i.e., length × width × height.
3. Express volume in terms of meters: volume = length × width × height = m × m × m = m^3 (cubic meters).
4. Recognize that while liter (L) and milliliter (mL) are commonly used units for volume, they are not SI units; they are accepted for use with SI but are based on the cubic decimeter (dm^3).
5. Note that gallon (gal) is a unit of volume used primarily in the US customary system and is not an SI unit.