A business analyst is allocating elicited requirements to an appropriate category in a requirements catalogue. Here are five of the captured requirements:
A) A sales person must be able to confirm a sales order.
B) Only customers with a 'normal' status should be permitted to place orders.
C) The order management system should hold the data for 'barred' customers for five years.
D) A stock picker must be able to mark an order as 'picked'
E) The order management team should be able to view sales orders by time range and status.
Which of these requirements will be classified as functional requirements in the requirements catalogue?