From \( 10^{\circ} \mathrm{C}, 30^{\circ} \mathrm{C}, 40^{\circ} \mathrm{C} \), and \( 65^{\circ} \mathrm{C} \), select the best estimate of the Celsius temperature of a warm winter day in New Hampshire. The average temperature in New Hampshire during the winter is about \( 30^{\circ} \mathrm{F} \). Choose the teriperature that best represents a warm winter day in New Hampshire. \( 10^{\circ} \mathrm{C} \) \( 40^{\circ} \mathrm{C} \) \( 30^{\circ} \mathrm{C} \) \( 65^{\circ} \mathrm{C} \)