Please Refer to the Following Short Case as You Respond

Please refer to the following short case as you respond to the question: A painter accepts orders for original works from customers in person or via the Internet.Based on the order, the painter creates an initial sketch, which must be approved by the customer; the customer may make changes to the initial sketch.After customer approval, the painter selects appropriate materials and gives the customer a price quote.If the customer accepts the price quote, the painter creates the original work; if not, the project is abandoned.The painter stores data about customers, previous orders and previously completed works in an electronic database.In a data flow diagram of the case, "previously completed works" are most likely to be represented with a:

A) Rectangle
B) Set of parallel lines
C) Numbered circle
D) Unnumbered circle