Final answer:
Vlad II Dracul recovered the throne of Wallachia in winter/early spring 1444 through diplomacy.
Step-by-step explanation:
Vlad II Dracul recovered the throne of Wallachia in winter/early spring 1444 through c) Diplomacy. Instead of using military force or popular uprising, Vlad II Dracul utilized diplomatic tactics to regain his throne. He formed alliances and negotiated with powerful figures to secure their support and assistance in reclaiming his position of power.