Answer:
a) psychological noise
Explanation:
In psychology, the term psychological noise refers to a mental interference that exists in the speaker. One form of psychological noise is wandering thoughts, in other words, the speaker is not focused and his thoughts keep wandering away from the topic he should focus in.
In this example, Colin had a very well practiced speech but on the day he was supposed to give it, his girlfriend broke up with him. Therefore, he found impossible to keep his mind on his speech or audience. We can see that Colin had difficulties staying focused and his mind kept wandering away from his speech because of what happened with his girlfriend. Therefore this would be an example of psychological noise.