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 .

Available choices:
A). He is being called to pick up his kid .;
B). None of the above choices .;
C). He is being called to troubleshoot computers .;
D). He is being called to substitute teach .;
Answer the following question: Why is the narrator constantly traveling to schools ?
C).