Answer:
"A. We understand that Polyneices was wild and feirce in battle".
Step-by-step explanation:
Polyneices being described as the "wild eagle screaming insults above our land" means that he was "wild" and "fierce" in battle. He is like an untamed creature who can defeat the opponent because of his fierce nature. Here Polyneices is referred by choragus that all those who fought against "Thebes" was punished by God. This also suggests that Polyneices was also punished by God for bragging of his strength. The chorus suggests that Polyneices is arrogant in nature.