Identifying Allusion in Literature

In literature, an allusion is a reference to a well-known person, place, event, or work of art. It often serves to deepen the meaning of a text by connecting it to broader cultural contexts. Below is an example sentence:

"Like a modern-day Achilles, she faced her challenges head-on, determined to win at all costs."

Which of the following best identifies the literary device used in this example?