Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli.

• A
  High $pO_{2}$,low $pCO_{2}$,less $H^{+}$,lower temperature
• B
  Low $pO_{2}$,high $pCO_{2}$,more $H^{+}$,higher temperature
• C
  High $pO_{2}$,high $pCO_{2}$,less $H^{+}$,higher temperature
• D
  Low $pO_{2}$,low $pCO_{2}$,more $H^{+}$,higher temperature