The figure given below is a diagrammatic representation of the response of organisms to abiotic factors. What do $(i)$,$(ii)$ and $(iii)$ represent respectively?

• A
  $(i)$-regulator,$(ii)$-conformer,$(iii)$-partial regulator
• B
  $(i)$-regulator,$(ii)$-partial regulator,$(iii)$-conformer
• C
  $(i)$-partial regulator,$(ii)$-regulator,$(iii)$-conformer
• D
  $(i)$-conformer,$(ii)$-regulator,$(iii)$-partial regulator