Final answer:
Octavian enjoyed wider public approval over his rivals.
Step-by-step explanation:
During the wars between the members of the Second Triumvirate, Octavian enjoyed the advantage of wider public approval over his rivals.
Octavian's success in the civil war was largely due to his support from Caesar's military veterans, who viewed him as the lesser evil compared to rival Mark Antony. He also strategically allied himself with optimate factions, despite their previous opposition to Caesar. Octavian's wider public approval and alliances helped him gain an advantage over his rivals.