The Greek chronicler Polybius, recording the sack of Rome by

The Greek chronicler Polybius,...., notes....that it was contemporaneous with X and Y, and that it happened A and B --> parallel

Only E meets this.

The Greek chronicler Polybius, recording the sack of Rome by Gauls in 387 BC, notes laboriously that it was contemporaneous with the peace of Antalcidas and the siege of Rhegium by Dionysius, and that it happened nineteen years after the battle of Aegospotami and that sixteen years before the battle of Leuctra.

(A) with the peace of Antalcidas and the siege of Rhegium by Dionysius, and that it happened nineteen years after the battle of Aegospotami and that sixteen years before the battle of Leuctra.
(B) to the peace of Antalcidas and the siege of Rhegium by Dionysius, and that it happened nineteen years after the battle of Aegospotami and that sixteen years before the battle of Leuctra.
(C) with the peace of Antalcidas and the siege of Rhegium by Dionysius, that it happened nineteen years after the battle of Aegospotami and that sixteen years before the battle of Leuctra.
(D) to the peace of Antalcidas, the siege of Rhegium by Dionysius, and that it happened nineteen years after the battle of Aegospotami and sixteen years before the battle of Leuctra.
(E) with the peace of Antalcidas and the siege of Rhegium by Dionysius, and that it happened nineteen years after the battle of Aegospotami and sixteen years before the battle of Leuctra.