The specific heat of a material is given in a strange unit to be c = 3.60 kJ/kg = °F. The specific heat of this material in the SI units of kJ/kg °C is
(a) 2.00 kJ/kg • °C
(d) 4.80 kJ/kg • °C
(b) 3.20 kJ/kg • °C
(e) 6.48 kJ/kg • °C
(c) 3.60 kJ/kg • °C