Read the following context and choose the best option to answer the question.
Context: After about 3 minutes of this I was feeling quite homicidal . One day the woman giving the training spoke with me privately to say she appreciated the fact that I did n't say sorry every time I misunderstood something . I think I said something like , " Oh ... thanks . "
Question: What is causing the narrator 's so much anger ?
Options: 
- They are upset over a training class .
 - They are upset over politics .
 - None of the above choices .
 - They are upset over a conversation taking place privately .


They are upset over a training class .