Read the following context and choose the best option to answer the question.
Context: It was due to be delivered this afternoon between 12:30pm and 4:30pm and they were supposed to phone me half an hour or so before they were due to arrive . I work only 10 mins drive from home so the plan was to pop out and meet them and come straight back to work . As luck would have it , they phoned me at 1 pm on the dot , the start of lunch break ( just as I was about to open my tin of beans for lunch !
Question: What is a cause of the narrator 's stress ?
Options: 
- They dislike driving .
 - They hate work .
 - They dislike their lunch .
 - Their guest is not punctual .


Their guest is not punctual .