Use the bond dissociation energies $\mathrm{CH}{}_3-\mathrm{H}=435$, $\mathrm{H}-\mathrm{Cl}=431$ and $\mathrm{H}-\mathrm{Br}=366\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}$. The enthalpy changes (kJ/mol) for the hydrogen abstraction steps $\mathrm{CH}{}_4+\mathrm{X}\cdot \to \mathrm{CH}{}_3\cdot +\mathrm{HX}$ for X = Cl and X = Br respectively are

1. A+4 and -69
2. B+4 and +69
3. C+69 and +4
4. D-4 and -69