What is the speaker's purpose in the persuasive speech model you just read?

The one certain thing about the message you sent to the receiver is that the receiver will: a)process the information sequentially, not simultaneously. b)interpret it based on their framework of experience. c)not be able to interpret all the relevant information. d)revise his/her premises according to the information sent.

According to the speaker, decisions in west african villages are made through discussions led by heroic nobles wise historians elected representatives appointed chiefs

What is the italicized part in the sentence , all of the operators are efficient.