C. As such, it is a ElectricCharge.
The constant should be used as a macro ELEMENTARYCHARGE:
ElectricCharge Q; Q = ELEMENTARYCHARGE; // assigns the value of the elementary charge to variable Q
elementaryCharge. The ElementaryCharge is a derived quantity with electricCharge::Quantity as the base quantity, and does incorporate all features of an electric charge.back to Physical Quantities start page
1.5.6