Read the following context and choose the best option to answer the question.
Context: One third of the schools are done and the new system is awesome . Most of the schools I cover still have the old equipment so I do alot of service calls . I am currently in a Cisco CCNA class at college .
Question: Why is the narrator constantly traveling to schools ?
Options: 
- He is being called to pick up his kid .
 - None of the above choices .
 - He is being called to troubleshoot computers .
 - He is being called to substitute teach .


He is being called to troubleshoot computers .