I think D but I am not positive, get another answer and see which one is better. <33
The answer to this question is D) It includes the use of repetition.
In human relations, the irritation threshold is the <span>point at which a person notices something and becomes annoyed.
This threshold can be quite different for different people - some people may have a really high irritation threshold, meaning that there isn't much that could annoy them. On the other hand, some people can become annoyed with the littlest things - it really depends on a person.
</span>
