Asap answer !
the conclusion of a speech should

a. introduce new ideas and information

b. summarize the main points of the speech

c. be the longest part of the speech

d. occur at the beginning of the speech

B. Summarize the main points of the speech

The answer to this question is:

B-"Summarize the main point of the speech"

Because thats is what makes a Perfect to any conclusion in a speech because introduce the idea and information is the intro that suppose to do that and the conclusion doesn't have to be the longest part of the speech and it most diffidently don't start at the beginning 

Hope This Help, Juancaromo99
Your Welcome :)