Which calculation clearly shows a conversion between temperatures in degrees Celsius, t (degree C), and temperature in Kelvins, T(K)?
a. T(K)=t(degree C) +273.15
b. T(K) = [t(degree C) -32]/1.8
c. T(K) = [t(degree C) +32) times 1.8
d. T(K) = 273.15 - t(degree C)
e. T(K) = t(degree C)