Jeremy is struggling with whether the presentation he makes should consist of strong logical arguments, or should be short with elements of surprise in it. in the context of the elements of persuasion, which element is jeremy struggling with?

Message

Explanation:

According to elements of persuasion,message is described as central content that contains emotional as well as actual arguments. Message is written by the writer, therefore the complete control on message belongs to the writer.

According to the situation in question,Jeremy is in dilemma with message of the persuasion element. He is not able to decide whether the content of message should contain strong argument or surprise elements.

As he has total control over the message he can involve any element he want to convey through that message.  

the answer is d.index