Paul Works for the Australian Government; He Travels from Store

Paul works for the Australian Government; he travels from store to store checking for illegal pricing activity. Which of the following price situations would Paul deem inherently illegal?

A) An organisation establishes an artificially low price for one item in a product line in order to attract buyers into a store, but has sufficient stock of that item and is willing to sell it for that price.
B) An organisation charges different prices to customers in different geographic regions due to higher transportation costs.
C) An organisation offers a low entry price for a basic product, and then charges more for desirable additional parts or functions.
D) An organisation offers volume purchase discounts.
E) None of the options listed.