Hello. You did not inform the speech to which this question refers, which makes it impossible for it to be answered accurately. However, I will try to help you in the best possible way.
If King was trying to be persuasive, lines 307 - 334 can only affect persuasiveness by reinforcing the argument King is making. This can be done through a clear and objective diction that reinforces the importance of King's words. In addition, these lines can create a logical, ethical or emotional structure for the speeches, proposing a greater connection between king and the public.
Kate is trying to convince Keller that Annie will be good for Helen.
The best answer in my opinion is the third choice.
5) You won't BE ALLOWED TO buy a ticket for that film because you're too young.
4) Were you ALLOWED TO go home early?
5) Why wasn't she ALLOWED TO stay at Sarah's house?
What is this question on...and do you still need the answer???