Final answer:
Achilles and Beowulf are both epic heroes noted for their strength and courage, making option A the correct comparison trait they share.
Step-by-step explanation:
In comparing Achilles from Homer's Iliad and Beowulf from the Old English epic poem, both characters exhibit traits of strength and courage. These two warriors are celebrated in their respective cultures and literary traditions for their physical prowess and brave deeds. They demonstrate arete, a concept in Greek culture that stands for excellence and moral virtue, as well as the ability to succeed in battle through one's physical capabilities. Therefore, when comparing Achilles and Beowulf as epic heroes, the trait that both possess is option A: Strength and courage.