Calculate the Activation Energy, in KJ/mol, for the Redox Reaction

Calculate the activation energy, in kJ/mol, for the redox reaction Sn²⁺ + 2Co³⁺  Sn⁴⁺ + 2Co²⁺.

A) 59.2
B) 0.477
C) 5.37
D) 163 kJ
E) 48.1 kJ