Answer:
C. equals the mass of 1 mL of water at 4°C
Explanation:
The gram is metric system unit of the mass.
1 gram is defined originally as absolute weight of the volume of the pure water equal to 1 mL which is at 4 °C, the temperature at which the density of the water is maximum density.
It was adopted and also introduced by French National Convention in 1793.
