Final answer:
The phrase "in the time of Elizabeth" is the best example of an allusion, as it references the era of Queen Elizabeth I without further explanation, assuming the audience's familiarity with the historical context.
Step-by-step explanation:
An allusion is an indirect or implied reference to another work of literature, person, or event, without explicitly mentioning it. Out of the presented options, "in the time of Elizabeth" serves as the best example of an allusion because it indirectly references the era of Queen Elizabeth I, which the audience is expected to recognize without further explanation. This type of reference relies on the reader's familiarity with historical or literary context to add depth to the text. Examples like this can enrich a story by drawing parallels or invoking the thematic elements associated with the alluded subject.