Which Calculation Clearly Shows a Conversion Between Temperatures in Degrees

Multiple Choice

Which calculation clearly shows a conversion between temperatures in degrees Celsius, t(°C) , and temperature in Kelvins, T(K) ?

A) T(K) = t(°C) + 273.15
B) T(K) = 273.15 - t(°C)
C) T(K) = [t(°C) - 32] / 1.8
D) T(K) = [t(°C) + 32] × 1.8
E) T(K) = t(°C)