400
                                	____ is a typical example of a system requirement for the performance category.
a.	The purchasing system must provide suppliers with up-to-date specifications
b.	Each input form must include date, time, product code, customer number, and quantity
c.	The manager of the sales department must approve orders that exceed a customer’s credit limit
d.	The student records system must produce class lists within five hours after the end of registration
                                d.	The student records system must produce class lists within five hours after the end of registration