"Professor Wilson tells his students that only the most important concepts from the chapter will be on the next test. Student A and student B have different ideas about just which concepts are the most important. This is an example of"

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Professor Wilson tells his students that only the most important concepts from the chapter will be on the next test. Student A and student B have different ideas about just which concepts are the most important. This is an example of .

negotiation

vagueness

motivation

contextualization

This is an example of vagueness.

Explanation:

Vagueness happens in communication when the receiver of the message cannot fully understand what the message means or to what it refers. That means that the way the message was structured or the language used were imprecise or unclear. Vagueness usually happens unintentionally, but it can hinder communication greatly. Since students A and B in the passage have different ideas about which concepts are the most important, they will focus on different parts of the whole. That can mean one of them will do better than the other, in case his/her ideas coincide with the professor's.

c it has to be i googled it

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.