The Arrhenius Equation Describes How the Rate of Reaction of Many

The Arrhenius equation describes how the rate of reaction of many chemical reactions varies with temperature $k=A e^{\frac{E_{\mathrm{∘}}}{R^{m}}}$ . Match the symbol with its description.
-R

A) rate constant
B) activation energy
C) pre-exponential factor
D) ideal gas constant