Kratz Computer Repair maintains a database that contains a table of information about each repair job the company agrees to perform. The jobs table is described as: tblJobs(jobId, dateStarted, customerId, technicianId, feeCharged). Each job has a unique ID number that serves as a key to this table. The customerId and technicianId columns in the table each link to other tables of customer information (such as name, address, and phone number) and technician information (such as name, office extension, and hourly rate). When the tblJobs and tblCustomers tables are joined, which is the base table?
a. TblJobs
b. TblCustomers
c. TblTechnicians
d. A combination of two tables