Which one of the following choices is equivalent to 1 nm³? 1 nm=10⁻⁹ m (1 nm stands for 1 nanometer)
a. 10⁻⁹ m³
b. 10⁻¹⁸ m³
c. 10⁻²⁷ m³
d. 10²⁷ m³
e. 10⁹ m³