The correct option is C A - Regulator, B - Conformer, C - Partial regulator
"A" represents the response of regulators to the abiotic factors. Regulators are able to maintain homeostasis by physiological or behavioural means. This ensures constant body temperature, constant osmotic concentrations etc.
"B" represents the response of conformers to the abiotic factors. When temperature is taken into consideration, their body temperature changes with the ambient temperature (external temperature).
"C" represents the response of partial regulators to the external abiotic factors. They have the ability to regulate body functions to a limited extent.