Calculate the Average Si-Br Bond Strength for an Individual Si-Br $\Delta$

Calculate the average Si-Br bond strength for an individual Si-Br bond in SiBr₄. The $\Delta$ H_ac for SiBr₄(g) is -1272 kJ/mol_rxn.

A) 3.66 kJ/mol
B) 254 kJ/mol
C) 318 kJ/mol
D) 636 kJ/mol
E) 1272 kJ/mol