The Relative Nucleophilicities of Species Do Not Necessarily Parallel the Relative

The relative nucleophilicities of species do not necessarily parallel the relative basicities of the same species because

A) not all nucleophiles are bases,and vice versa.
B) experimental measurements of sufficient accuracy are not available to make the comparisons.
C) nucleophilicity is a thermodynamic matter; basicity is a matter of kinetics.
D) basicity is a thermodynamic matter; nucleophilicity is a matter of kinetics.
E) Actually,the relative values do parallel one another.