Answer:
The correct answer is Relational dimension.
Explanation:
In communication there are two dimensions the actual content of a communication which is the content or the information being explicitly discussed and the other dimension which is the relational dimension which is the part of the communication that is not explicit in it but it's whatever the message communicate about the messenger's feelings towards the other person or the listener. Therefore in Andrew's interaction with the professor we can clearly evidence that the message that the professor gave corresponds to the Relational dimension.