Which Is NOT a Strategy of Ribonucleotide Reductase to Afford $\rightarrow$

Which is NOT a strategy of ribonucleotide reductase to afford a proper balance of dNTPs for the cell? In general:

A) adenosine nucleotides in the regulatory site $\rightarrow$ pyrimidine nucleotides recognized in the catalytic site
B) dGTP in the regulatory site $\rightarrow$ ADP recognized in the catalytic site
C) dATP in the regulatory site $\rightarrow$ GDP recognized in the catalytic site
D) dTTP in the regulatory site $\rightarrow$ GDP in the catalytic site
E) adenosine nucleotides in the regulatory site $\rightarrow$ varied subunit stoichiometries