Answer:
(2) Romeo does not want Juliet to be like Rosaline, who was like the goddess Diana.
Explanation:
An allusion is a passing reference to a thing that is not explicitly or directly expressed. Rather, it is expressed through the use of other means to show or reveal its intended meaning.
In the given monologue from Act II scene ii of the play, Romeo describes his new love Juliet as like the sun who is fairer than the moon "who is already sick and pale with grief". This comparison is between Juliet, his new love, and Rosaline, his former love. And the lines of the monologue shows his love for Juliet and does not want her to be like Rosaline, who he thinks, was like the goddess Diana.