Final answer:
A rooster of a fighting breed, like the University of South Carolina's mascot, is called a Gamecock. Gamecocks are bred and trained for cockfighting competitions and are known for their aggressive behavior and strength.
Step-by-step explanation:
A rooster of a fighting breed, like the University of South Carolina's mascot, is called a Gamecock (option A).
A Gamecock is a male rooster specifically bred and trained for cockfighting competitions. They are known for their aggressive behavior, strength, and endurance, making them suitable for this sport.
The University of South Carolina adopted the Gamecock as its mascot due to its association with courage, tenacity, and fierce competitiveness.