The figure given below is a diagrammatic representation of response of organisms to abiotic factors.What do A,B and C represent respectively?

Question

$\begin{array}{1 1}(a)\;\text{A=conformer,B=Regulator,C=Partial regulator}\\(b)\;\text{A=Regulator,B=Conformer,C=Partial regulator}\\(c)\;\text{A=Regulator,B=Partial regulator,C=Conformer}\\(d)\;\text{A=Conformer,B=Regulator,C=Partial regulator}\end{array} $