Answer:
The point of his speech is:
E. to discredit Romeo's worries and concerns about going to the party.
Step-by-step explanation:
Romeo and Mercutio are on the way to Capulet's party. The Capulets have been in a bloody feud with Romeo's family for generations. If that wasn't enough for Romeo to not want to attend the party, he also claims to have seen it in a dream that going to the feast was a bad idea. That's when Mercutio's speech about Queen Mab starts. He is mocking Romeo's worries, mocking his belief in his dreams. Queen Mab is a queen of fairies, who visits people in their dreams. The whole purpose of the speech is to discredit Romeo's concerns and convince him to attend the party. As we know, Romeo's dream was indeed foreshadowing the tragic ending his story will have.