Answer:
Look that up on Google because I don't know. If you cannot find the answer still, try Firefox.
Explanation:
I might edit this if you still can't find the answer.
Answer:
D. cos its different format, hence it can test different audience
Explanation:
A a dog bit me? so that means all dogs are mean
I believe it is the introduction which should be relatively brief. You shouldn't prolong it too much, because the emphasis should be put on the main part of your speech, and not so much on the introduction.